New MIT Discovery Just Solved Water's BIGGEST Mystery!
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- เผยแพร่เมื่อ 22 มิ.ย. 2024
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Scientific discoveries have a way of changing the world. Like the photo-electric effect that paved the way for LEDs and Solar panels. For a long time, we thought the sun evaporated water by heating it, but a new discovery on the Photo-Molecular Effect might just change our understanding of the water cycle forever. And there just might be countless new innovations that stem from it. From more efficient desalination, to new methods of keeping cool, this has the potential to be a gamechanger! So how does it work, and just how impactful might it be? Let's figure this out together!
MIT Article: news.mit.edu/2024/how-light-c...
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Chapters
0:00 - Introduction
1:00 - Evaporation
2:06 - Photomolecular Effect
5:40 - How it works
9:00 - Efficiency
10:00 - Why it MATTERS
what we'll cover
two bit da vinci,New MIT Discovery Just Solved one of Physics BIGGEST Mysteries!,photomolecular effect,photo-molecular,mit,mit discovery,mit breakthrough,mit photomolecular effect discovery,photo-molecular effect,photo molecular effect,how does water evaporate,what causes water evaporation,how the water cycle works,physics breakthrough,physics discoveries,the photomolecular effect,how the photomolecular effect works, New MIT Discovery Just Solved Water's BIGGEST Mystery! - วิทยาศาสตร์และเทคโนโลยี
This is the type of information that the media should make viral instead of violence, hate, and gossip.
I pray we end Nixon's War On Blacks - now that you mention it.
Stop watching that kind of content. Problem solved
agree, but this will only be of interest to people that have some intelligence..sadly a lot of us dont seem to have much.
O yeah ma racism always one @@msimon6808
Unfortunately, people can't virtue signal and show they are part of the "team" by just reading about green light.
Makes complete sense why plants hate green light. Green light evaporates water so plans reflect it away to reduce water evaporation.
Dude, that's right! Also probably why chlorophyll evolved to absorb everything BUT green light. Nice catch!
holy crap! I hadn't thought about that, but it does make perfect sense! need to look into this more!
This is so cool. Got me thinking. Could be why temperatures are cooler around plants, too. They reflect the green light so there is more free green light in the vicinity to evaporate water in the air. Maybe the evolution wasn't just to conserve water for the plant, but a symbiosis between the plants to keep each other cool.
-clorophyl does't evolve theres only two types a/b and they have been the same since...a very long time ago
-photosynthesis uses 1/ red and blue light 2/water captured by the ROOTS 3/ C02 from air
and it produces 1/ carbs that store energy or let the plant grow 2/ O2 released 3/ the green light not used is reflected
-leaves have "pores" that can close to block C02 and stop photosynthesis if the plant lacks water
so if plants could evolve to process green light they would probably do and would have darker, less colorful,
almost black leaves and would grow faster/require less light. light is a scarce ressource in dense primary forest and creates strong competition between plants to grow quickly and reach rhe canopy. plants able to process green light too would have a buge competitive advantage.
if dew is on the surface of the leaves it has more chance to be evaporated by the white light from the sun + green light reflecred ny the leaves
@@geemy9675 Fine, it's an accidental side effect of a random mutation that proved advantageous over time. :)
On the other side of the coin, this shows how important it is to shade/protect reservoirs and waterways from the sun.
I remember a couple years ago they were dumping tons of black balls into reservoirs to prevent evaporation. I finally understand why it worked.
@@gregjackson4117 Exactly. I was thinking about that when I made my comment. I also wonder if there's a way to plant canopies over the waterways...or at least plant trees on both sides.
A large scale Australian study on evaporation found that light had a significant impact on evaporation that was not modelled and they had to adjust evaporation models to include amount of light to get accurate predictions (the trend in data correlated "Global dimming"'s effect on evaporation). The exact mechanism was not studied but the effect was identified. Good to see this is all tying back to the fundamentals
They also found the by product of desalination was killing ocean life when disposed into the ocean. Read the articles. it shocked them they love the oceans. But were killing it with out of control balances of the by products removed from the ocean water History read articles
It seems odd to me that this hadn’t been discovered long ago. I wonder how many other important discoveries are staring us in the face.
Chances are the effect is negligible and can only be seen because the technology is accurate enough to measure it. I don't see it changing any industrial process, but if it has an effect on weather forecasting, it might still be very useful.
That's what's most fascinating about this! It's not even a minor effect, it's just small under sunlight because only a small fraction of the spectrum is green and the light is randomly polarized (or unpolarized, which is the same thing). I think it's one of the best discoveries since stuffed-crust pizza.
Now guess how long it will take this to be presented as a rock solid counterargument to the greenhouse effect and climate change in general, because SEE we don't understand it AT ALL - that kind of ignorant bs is already on the way.
Now to be honest this is agreeably a bit concerning, if there's even a 0.1% difference in the effects of solar radiation to what was understood before, that can quickly accumulate into massive divergences in the applied models, so yeah, what the hell..
Is this really a brand new discovery in 2024? Also seems to be not too subtle, so after decades of precise measurements, how such a thing gets missed for so long? And if this really is the case, what the hell do we actually know, what else we missed, damn this raises a number of rather uncomfortable questions...
What is odd is that we are told how evolution, the big bang, quantum particles, dna and many other things work but we don't truly know how many basic things work.
Much to my dismay, I've recently discovered most of my farting would be best done on the toilet.
The problem with complex machines to do simple tasks like desalination is that they are complex machines, I am a wastewater engineer and oil chemist. I have read hundreds of patents of supposedly better ways to accomplish tasks like this that never pan out. The simplest machines work the best because their maintenance is low. Less moving parts means great longevity. Complexity weakens efficiency. You end up losing the money you would have otherwise saved because you saw it was more efficient in the lab. When you try to scale it up is when you see all the holes in the science. Then again I love to be proven wrong.
Although I Agree with your premise, I disagree with your conclusion only in this discoveries regard.
It will realistically take decades to take advantage of in high enough efficiency to be economically viable like solar panels but it fundamentally has a much higher peak potential that current methods and uses a natural phenomenon to do. Something which mechanically complex currently so much higher ceiling combined with fundamental mechanical simplicity as we're taking advantage of a natural process leads to much cheaper costs even though it make take decades to actualize
I agree with you. Simpler is always better. This is the reason why, despite the persistent promises, Hydrogen fuel will never be an effective automobile answer. But, perhaps with micro-electronics they can develop waveguides that transmute light into better bands to create a simpler process. Or maybe not? They are coming up with better materials to desalinate water so better material and material construction science seems to be our best hope with improving these kinds of things.
@@NadeemAhmed-nv2br There is no evidence presented in the video that using light is more efficient than other methods for evaporating water for any industrial purpose. The only claim is that 4 times as much water vapour was removed from the liquid water, but to stay as vapour it needs to take energy from the surrounding air, which will only happen by continuously adding heat to the air that's circulating through the evaporation system (Doing it with small volumes of water in a lab gives the process a plentiful supply of spare thermal energy. If this effect was usefully strong it would have been observed and measured literally centuries ago. Also MIT, among other universities, is not above chasing media attention and more importantly venture capital funding by lying about their discoveries, so until other people replicate these results they can't be assumed to be true.
@@peglor Seems a worthy endeavor, and the concept is simple enough to build a small unit relatively cheap. The polarizer though may not be.
I know this principle as moving parts. electronic injection in cars has many more parts than carburetors, but they have much fewer moving parts, which is why carburetors were discontinued, if this technology has more parts but the same technologies are immobile, or more durable than desalination filters, so the new technology wins.
Makes sense, my thoughts went to watching snow melt on a day where that day's temprature is below freezing but still melts under sunlight
I dry clothes with the sun sometimes; much faster than just hanging them up indoors. I always chalked up the speed to heat from the sun. Having learned the common wisdom stood in the way of receiving lessons from my own experience.
It's far better outside. I agree. Love sun dried clothes cause they are naturally soft and smell fresh and NOT like some perfume crap like Febreze or Gain. Yuck!!!
more dryer air more moving outside
I live in a cold climate in Canada. I watch ice shrink in the winter in conditions of -40° . I have always been told this is sublimation. We hang wet clothes outside and they become dry.
Back in the 40s and 50s, my grandmother used to hang the clothes too dry in Chicago winters and occasionally, break a corner off. They dried in the cold too.
This (the video topic) is not sublimation. This is a light hitting the surface of the water causing the formation of a mist (i.e. tiny droplets of liquid water) which drift off and later evaporate in the air.
The higher rates of evaporation here are not really anything special it is just a result of more surface area and interaction with the air. You would get a similar effect agitating the water in some other way. They just happen to be doing it using light here.
Since sublimation is literally a solid changing to a gas without existing in an obvious liquid state in between, it is sublimation.
@@nwchrista Cold air can't hold as much humidity. Winters are always drier than summers.
Like many have said already, I wouldn't be surprised with how dry the air is to pull moisture out of the clothes.
This actually makes a lot of sense. Why we get heavy evaporation on both snow and water when the temperature is near freezing. We get these heavy ground fogs at first light that hold until the day warms up at around 10am…then the evaporation is no longer visible.
Evaporation caused by the photo electric effect occurs at any temperature including below freezing.
@@kennethhawley1063 That's what he's saying.
Also the 10am sun, forget the DST stuff, is around 45 degrees so optimal for the light based evaporation model. Also it's green light and plants leaves are generally green - seems nature pointed the way on that (reasoning is that plants do photosynthesize but also require water to do so - reflecting the green light reduces water loss smart plants.)
its called sublimation in frozen water...evaporation only happens to liquid water
fog is not evaporation its condensation. the cold air sinks and where it meets the warm air above it causes the water held in the warmer air to drop out causing fog.
It seem this also gives a better answer to the very simple question: Why are most plants green?
We know that most forms of chlorophyll absorbs mainly blue and red light for photosynthesis; but they reflect green light
So, this is cool. By reflecting light in the 520nm range (green), they would greatly reduce the photomolecular effect and better retain water.
This effect is very intuitive. When we say "the fog is burning off" we are not saying it evaporates, but that the sunlight is affecting it. I'm surprised this was discovered recently and not 200 years ago or more.
Makes sense, this is why shade from tree cover is so good at maintaining moisture in the soil. Also explains why all plants have a green colour, to reflect the evaporating light back!
Also mowing the grass taller . If an area is too wet we mow it shorter. If it's very sandy soil we mow it at least 3" to help keep the water vapor in the soil.
Well bless your heart ❤. I guess any color other than green would dry out the leaves more quickly.
I think the green color has more to do with the absorption spectrum of chlorophyll. The job of the leaf is to reduce CO2 to more energetic molecules like sugars. The chlorophyll absorbs blue and red light, leaving the green light to be reflected, so the leaf looks green. The absorbed photons provide the energy to run the process of photosynthesis. Since there's not liquid water on the surface of the leaf most of the time, I doubt the photomolecular effect is doing all that much to cool it.
tree shade is trapping moisture because there's not that much energy input compared to lit area. red beach umbrella will have the same effect. plants are usually (but not always) green, because genetically its more efficient to evolve into something that matches quantum efficiency of photosynthesis, more electron transfers happen in the blue and red frequency bands just due to energies involved in excitation of electrons in carbon dioxide and water bonds. carbon dioxide's excitation peaking at blue color and water's at red. if simpler genome has same fittness, it will reproduce more just because it needs less resources. I'm pretty sure you've seen more than negligible amount of red trees with same if not damper soil underneath them just because more reflection in close infrared band, to return to the first idea. but cool study indeed.
There is no other reason that chlorophyl would be green. Think about it deeper. His theory makes sense.
I don't understand something, why is no one talking about the differential water vapor pressure? I was taught this was the main contributor to water evaporation under regular conditions (20°C, 1 atmosphere).
Seems like you need to clarify your question.
I assume the thermal limit he discusses at the beginning of the video is for a dry atmosphere where the vapor pressure is lowest. He says that this research is showing evaporation due to the photomolecular effect can reach even higher evaporation rates.
pV=nRT
and furthermore... what about sublimation with light ?
@@oldarisso6819 - Sublimation with light seems like a reasonable hypothesis to look into. It will likely require photons of higher energy, or more arriving simultaneously (and perhaps coherently).
But what is your point about the very basic pV=nRT? How do you figure that Ideal Gas law applies to a polar opposite situation, namely, Phase Change?
That is a very valid question, and I’ll try to answer it as best I can as a professor of thermodynamics: What you’re referring to about water vapor pressure is related to something called spontaneity.
Water’s vapor pressure is the pressure of gaseous water you’d need in the air for both liquid and gas to be at equilibrium, in other words, for evaporation and condensation to balance each other out and for the bulk of the water NOT to evaporate.
When the pressure of water molecules in the air is lower than water’s vapor pressure for that given temperature (which is the pressure differential you’re talking about), the bulk of the water will spontaneously (naturally) evaporate until the air is saturated with water (the pressure reaches water’s vapor pressure), or until it completely evaporates.
In short, water (and all liquids and solids) is always evaporating and always condensing. The pressure differential only tells you which of the two processes wins over the other and whether you see a puddle dry up, get bigger, or simply stay as it is.
This discovery is about HOW water evaporates, not about what happens when it does or in which way the liquid-vapor equilibrium tilts. That’s why no one is talking about differential water vapor pressure. I hope that answers your question.
I learned in school, and has observed myself how ice/snow can go straight from solid to gas phase - even at night.
So the MIT discovery must be an addition.
Water doesn't only evaporate due to heat. All molecules try to obtain a balance reaching a certain saturation in oaetial pressure.
It's going to be interesting when they account for this effect in the climate models.
Exactly, simply put EVERY single weather model and study is totally and undeniably wrong.
Climate models will always indicate that you need to give more money to the government….
@@jasonborne5724 Oh. Ok, whateveryousay, I guess.
@@OttawaDN Hi Ottawa. Not necessarily. There's a vast difference between "wrong in magnitude" and "not relevant". But as you say, once this effect has been quantified under all real world conditions, climate models (which are only virtual computer models anyway), will need refiguring. Cheers, P.R.
@@OttawaDN its right if it fits a narrative though huh?
I love that this effect is getting more attention from researchers. It isn't BS.
totally agree!
They should study the ability of the sun to play a role with this new found effect, through the solid roof and walls of my house, when I boil water and some evaporates in my kettle!
@@TwoBitDaVinci although you delivered a factually incorrect piece of information there, buddy. You don't need heat in order to evaporate water, it is not a rule. Vapor pressure plays a pivotal role. It is an intrinsic property of liquids that involves the natural tendency of liquid molecules to go into the gaseous state. If you lower the surrounding pressure of a liquid, you evaorate it without having to heat it. Although you can accelerate the process if you add some heat.
Also, it is way easier to evaporate water directly from its solid state than from liquid state. Meaning, you evaporate water more easily from ice than from liquid water. That's why freeze dry works
It might not be completely BS, but the guy pretending it's some kind of world changing breakthrough is absolute BS. Converting any kind of energy into heat is very nearly 100% efficient. And as he said, converting into useful light is 65% at the best of circumstances. I understand he needs to make videos to make a living, but this is straight up sensationalised misinformation.
@@DanoKaroche Sorry to break it to you but even that spontaneous evaporation you’re talking about requires energy. Before, we would say it requires heat, but from now on, we should say energy because the energy doesn't have to come in as heat unless the water is in the shade.
To clear a common misconception, the fact that you don’t have to purposely provide the heat yourself to make water evaporate doesn’t mean water isn’t absorbing heat to evaporate; it just means you’re not the one providing the heat.
Water does absorb heat from its surroundings when it evaporates naturally in an environment where the air is unsaturated with water vapor (that’s literally how sweating cools you down, and it's why clothes feel cold when they dry spontaneously in the air). It’s a thermodynamic fact.
When the air is saturated with water vapor, evaporation and condensation balance each other out, and the heat that the evaporation process sucks up, condensation releases, so nothing gets colder or hotter: It's in equilibrium.
What these guys from MIT discovered is that you can provide the energy to evaporate water in a different way, i.e., without heat but light instead. It doesn’t violate the laws of thermodynamics because the energy to break molecules away from the water surface is coming from the photons, instead of coming in the form of heat. That’s an amazing revelation!
The most exciting phrase in science is far more likely to be "That's odd" than it is to be "Eureka"! *8')
And "What the hell am I going to do for a PhD thesis?" is pretty common.
Major league source of gen-you-whine mediocrity, stupidity, and half-wit pseudo-science.
"I can make money from that."
@@brodriguez11000 a real scientist isnt concerned about being rich
@@incriptioneww
Is that star a mustache, the 8 nerdy glasses, and the comma an eyebrow?
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This video actually helps me better understand a video you did last year about scientists attempts to use the layer of water vapor just above the ocean to act as a collector for fresh water.
MIT is doing something right. The research that comes out of MIT is fantastic. They really are the best minds, but they are using those minds to solve problems.
❤I studied with Horace McCracken in the late 80s. He was a champion of solar water distillation. I own one which has seen continuous use for 30 years. There are no filters and uses sunlight and the photo molecular effect to cause water in a shallow trough the vaporize and condense on the underside of shower door glass. It makes RO quality water with no filters. There is a fill up irrigation valve which lets in a small amount of water every night. A overflow lets out the excess. This makes a 2-3" shallow pond of water.
This all makes perfect sense. Sunlight is very reactive and interacts with anything exposed to it like my skin! Beautiful work to discover this photo molecular effect I knew it could not be heat alone which makes a solar still work so good!
What please is ro quality water?
@@jeffbybee5207 Reverse Osmosis
In 1988 Horace McCracken had a fancy scientific instrument called a Total Dissolved Solid meter. It was pricey and had a analog needle $500 in 1988 bucks. It was merely a resistance meter calibrated for TDS. Now they are digital and are very cheap. Water with low TDS is very pure. RO water when its working good will deliver water with ,0-4 PPM. The TDS measurement can't tell what's in the the water but how much is in it. Good question!
MIT didn't discover anything, anymore than Christoper Columbus discovered "america" even though there were already 50 million people living there. All this and many more properties of water are described in The Fourth Phase of Water by Gerald Pollack, been out for over a decade now.. I guess someone at MIT decided to buy and copy .. they "discovered" the book
I’ve long wondered if, in the long stretches of undeveloped land in CA, they could create long (switchbacked) solar still type water troughs on the valley side to desalinate agricultural water.
Pump (slightly inland for sand prefilter) ocean water up the mountain into one trough with a clear cap (this video suggests it should be a polarized cap that condenses into an adjacent trough. Have a couple iterations if need be. Truck or pipe the excess brine back over or through the hill, collect the evaporated water for agriculture. There’s lots of hilly land with lots of sun and the biggest cost is probably pumping the water up & a return for the brine.
Aside from the pump nand an occasional scrub down, it’s filter free with no moving parts and low maintenance.
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Why did you reupload this one ? I have watched it from the first URL, but I don't really see the difference 🤔
Even though, good video and really interesting information about water evaporation 👍
"we could also filter out green light from sun light, but that's not a good idea because we'd lose the rest of the light which is energy that we couldn't harness"
Sorry to disagree with this statement.
Sunlight is still free unlike the green light generated by electricity, therefore it doesn't matter if energy of the full sunlight spectrum is used or not.
When we are talking hypothetical scenarios, you could use frequency conversion crystals to increase efficiency when using sunlight.
It sucks when you have the skills to do something already but companies want a stupid piece of paper.
There is also a business opportunity on hair drying. Women want to have something to dry their hair without damaging it, which heat happens to do.
You forgot to pin it!!!
Very Very Cool!! Thanks so much for finding this and for your very clear explanation!!
This is an amazing discovery! Looking forward to see what other discoveries or inventions come next!
I found myself googling the thermodynamics of all this and then you started explaining it! And that's why I love your videos. Keep em coming!
Why is MIT so slow, or am I showing my ignorance? As a retired Professional Brewer, we've known about this for a long time. We just call it "Sun Struck". How to evaporate without heat - Only Photons from the Sun. Heineken beer is notorious for getting "Sun Struck" and evaporating a Skunk Sulfur smell without heat. This is why most beers are bottled in a dark brown bottle to filter out all sunlight aka: Photons. But now Heineken is known for their green bottles and refuses to go to brown bottles, even if it will get rid of the Skunk Problem. But that's another story... From a Retired Professional Brewer here in Las Vegas, Cheers...
Yes this has been discovered VERY long ago! The water in the air is a water molecule that has been hit by a photon or cosmic ray and has gone up in the air (essentially evaporating but not evaporating, it just remains suspended! This is how we have humidity and torrential rains when your window is cracked open but your room floor is totally wet... They are rehashing old news!
You’re thinking of UV light here. In the video it’s green wavelength specifically that’s creating this effect, which the green Heineken bottles would reflect away.
i think you're confusing the discovery of a phenomenon with fully understanding why it happens. there have been many cases where we've known things for thousands of years, but never knew *why* until recently.
@@cinebenjamin I was told the green is not dark enough to filter out the sun. Thus brown bottles for all except Heineken. So why hasn't Heineken switched over to brown bottles to keep their beer from being "Sun Struck"? Product Recognition. Heineken refuses to give up their famous green bottles because the green Heineken bottle is known worldwide. How do I know this? The guys at Heineken told me. I do love being a retired Professional Brewer...
@@TheShizzlemop Well, in this case, it sure sounds like they didn't know it was happening at all, not just why. They said evaporation rates are faster, evaporation happens without heat, etc. These all imply they didn't know it was happening. Either there's a misunderstanding or someone didn't do their research before doing their research.
Great explanation thanks. Subscribed after this vid look forward to more great content.
I used a "Light powered clothes dryer" for many years.
Just took longer to dry things when the temperature was way below freezing.
Now most municipalities ban the use of clothes-lines.
Why is it banned
@@aurorapaisley7453People don't like seeing others airing dirty laundry.
@@edeaglehouse2221 if it's on the clothesline it's clean dopey
@@GRAYgauss Hi GRAYgauss. Birdstrike's the problem. Cheers, P.R.
@@edeaglehouse2221 Hi Ed. I agree. Unmentionables must also be invisible. Cheers, P.R.
Stable-stagnant, flowing water and mist interaction with photons could be the different tests to understand this phenomenon further for applications.
I just love when science can explain so many things.
I used to be subscribed in the past, am rethinking of re-joining.
Thanks Ricki 👍💪✌
“He didn’t read it your message, but I did.” “Thanks walking talking trash can” said rchungus.
if you put ice cubes in a freezer and never touch the ice cubes for a long time you will see the ice cubes shrink because of it turning from solid straight into a gas. so there is almost no light hitting the cubes. could be something to do with pressure, but not sure.
That's sublimation....
Modern freezers are actually highly efficient dehydrators. Cooling is the effect of dehydrating. When you get frost build-up in your freezer, your condenser is overheating, say when the door is left open or not enough air gap is left between the freezer and the wall/floor etc.
Usually to get rid of frost, close the door. Dehydrating evaporates water.
"In this house we obey THE LAWS THERMO DYNAMICS" - Homer Simpson
But apparently not the laws of grammar or proofreading. 😂
@@mjt1517 Dude, its a quote from Homer Simpson, help me jebus.
@@publicdomain3378- no it isn’t, it’s a misquote because Homer said “laws OF thermodynamics”. Homer Simpson understood grammar even if you don’t.
Bart - What are the laws of thermodynamics?
Homer - D'oh!
the laws of thermo dynamics were proven wrong and are completely flawed, the black box experiments emitting radiation only worked if the box was made of pure carbon. And this evaporation effect was all figured out long ago, it was called polywater in the 70s and was discredited, plus there is far more to the effect, which Gerald Pollack wrote a book about The Fourth Phase of Water. What's next, is MIT going to go watch the Thunderbolts channel and claim that they figured out that stars are externally powered and steal all Wal Thornhill's work? And then read The Nature of the Atom by Edo and steal his work as well, claiming they figured out the neutron doesn't exist? Why was this covered up for decades and just now the media is announcing some truth? Plus they left out a lot more that goes along with structured water including that is has memory, it self purifies, it generates electric, and it can transmit complex DNA patterns. Seems like this "release" of information is just a limited hangout.
"New Discovery"? I remember reading about how light impacting on water causes it to absorb without it needing to heat up over a decade ago in college. Is it just have have done more testing to further confirm it?
This isn't absorption. Bulk water doesn't absorb green visible light. In fact, green is the part of the visible light spectrum that water absorbs the least. This is different
Great episode! Thank you. Some real knowledge for a change. This is the best kind of research and information that should be available from all from standard news sources and the 6pm news! Again, great episode!
Please stay happy, healthy and safe.
☀️😎🇨🇦
shoulda been on the 6pm news on july 14 2022, because this guy is just clickbaiting you, this isnt even from mit, it was discovered by a guy named gang chen, who worked at MIT, but got fired in 2018.
Being involved with steam generation, I always wondered why it's evaporating without boiling. Thank you for randomly answering this question today.
ideas:
* it could make wet coating of battery cells more energy efficient because the solvent needs to be evaporated after coating the surface with the black slurry.
* if there are two different liquids like alcohol and water to be needed to evaporate (destillery), but not at the same time, the photomolecular effect could be a better way of separation by finetuning the wavelength to a different molecule. this for me would be the real game changer because it goes beyond just saving energy, it might offer you a new function/tool.
* improving the efficiency of water electrolysis but you probably need higher frequencies which means a shorter wavelength to help breaking up the bonds between oxygen and hydrogen. the resulting effect might be a cooler H2 gas which saves you more energy in cooling/compressing.
on the other side, hot water might not need that much extra energy to be split up in H2 and O, so when compressing hydrogen in tanks, you could use the resulting heat to heat up the water.
I agree.... you cannot understate the economic impact to manufacturing. This is a multibillion dollar discovery.
the solvent is different from water, the photon basically rips the bond between the rest of the water with high energy, like twisting a water bottle and shooting it makes water vapor, the photon ripping it so fast causes it to evaporate, which means this most likely wouldnt work on highly structured compounds like a solvent. unless its alcohol, just blow hot air onto it from your mouth will do the trick.
Amazing! Great vídeo! Congratulations and thanks a lot!
You've earned another bit or two with this video information, thanx !!!!
MIND BLOWN!!! Thank you for this.
Probably my most important chemistry lesson for many decades - keep on rockin' here at Two Bit da Vinci 🙂
I love how photomolecular effect also helps use transition into advertisement so smoothly.
That must be why the color of money is green!
That may be related to the way that the funding of research tends to flow toward whatever justifies the establishment's domination of the people.
Thank u for divulging these breakthroughs ❤
Don't know why but so often when i hear about possible science breakthroughs i always ponder the possible dangers as most of us want good things but these days there is always companies etc that would use it for there benefit not the worlds.
Very well done on explaining it in a simple manner :)
Could we make a solar cell that lets the green light pass through and generate electricity from the rest of the spectrum?
this is very interesting, the key would be to collect as much electricity with band gap solar that allos allows the green through for some other effect. such fascinating potential!
photomolecular effect doesn't generate electricity though. but you could do the kther way around and have water on top of the solar cells rhat would evaporate and cool the cells and produce warer vapor at the same time. the problem is how to catch the water vapor on top of rhe cell Ithout obscuring the light. plus how to keep water on top if the cells are leaning towards light. you could use capilarity to slow down the water following gravity, and and a layer of air sandwiched between the layer of water + colar cells and a clear glass/poly panel, holding the vapor recirculated to condense into a distilled water container to make you solar panels produce electricity + drinking water. letting rhe solar panels flat would avoid the need to pump the water up the slope, but reduce the panels efficiency...also evaporating dirty water on top of a solar panel would quickly create residues that would block light so your water needs to be filtered first.
@@geemy9675 🤔 There's a new PlasmaChannel video where he moves water vapor around with static electricity. If you could get the system to naturally build up a static charge, maybe you could move the water vapor to the corners and collect it on mini fog nets? I am assuming the power it would take to power the static field from the solar collected would be more than a useful output of the panels.
Water droplets generate a static charge, but would there be enough generated by the drips from the fog nets? And not be discharged every time a squirrel ran across it.
Haha, maybe a wind powered wimshurst machine to power it 😁
@@colleenforrest7936 the static charge is not spontaneous but result of movement of falling droplets , it's only converting energy (potential >mechanic>electric). when you want to "produce" energy you actually have to wonder what energy you want to convert and what will supply this energy. thinking producing vapor will spontaneously generate electric energy is forgetting this basic principle
@@geemy9675 maybe even out the pulses with a supercap could you collect that charge in a supercap and then use that to power a battery that charges the static field on the solar panel. Granted, the math has to be done to see if it's a net positive system.
Putting this all together, you'd have a rechargeable battery responsible to keep a steady static charge over its assigned cel.
The battery is charged by a supercap, with some sort of distribution net to transfer excess static charge to other super caps (or electricity to the batteries if that's a better design) that are underpowered, and a sink to hold any excess charge above that for later use. The supercap is charged by droplets of water vapor condensing on a small fog net sitting sitting in the corner of a solar cel. This water is then channeled off to a freshwater holding tank. The water vapor is created by the evaporation of "dirty" by green light, with the rest of the light in the spectrum being allowed to reach the solar cel and generate electricity. The water vapor is moved to the corners of the solar cel and onto the fog nets by manipulating the static field, which is charged by the battery. As is current, there would be multiple cels on a panel, and multiple panels in the system. Questions as to wether the math works out on an ideal system, would the dirty water or water vapor reduce the charge to the solar panels...
Gees, I watch too much TH-cam 😄
Imagine going home for Christmas break from MIT, sitting around the dinner table father,mother brother,sister all happy to hear how their smart sibling/child is doing in school. Dad asks what you are doing and you say I am on a team that is revolutionizing science and your sibling asks how are you doing that and you say we are learning how water evaporates……………😮😂
Good one! ✌️😹
😂😂😂
And a blank lifeless stare in the sibling's eyes says everything you need to know: The sibling doesn't have a clue how water evaporates and therefore cannot grasp the awesomeness of making a breakthrough discovery on something so mundane as water.
In my family there would have been a choir of three brothers all saying sarcastically, "Oh, so YOUR TEAM AT MIT just INVENTED water evaporation??!! Are you going to PATENT it? Hey, stupid, water evaporation has been around since FOREVER. Way way back in Genesis 2:6 it says, " a mist went up from the earth.". So YOU didn't INVENT it!
A really excellent video. So well shot and narrated.
Excellent! Thank for sharing and explaining it!
It is wrong that heat is the source of evaporation. Actually, it is the saturation deficit that drives evaporation. This is also why clothes will also get dry in winter.
WhenI heard the initial claim that we thought it was heat, I was taken aback because I did not learn HEAT, I learned evaporation.
Enthalpy is what you are taught. Not heat.
Ice evaporates in my freezer.
@@freefall9832 That's not evaporation, that's condensation of the air's water. Like the one that happens in the outside of a bottle filled with cold water.
@magscorp13 Thanks, wouldn't condensation add ice.
Love your work dude.
How does this change our understanding of evaporation rates from plants?
Does the green pigment filter out green light wave lengths or reflect them?
Reflect. When you see color from an object illuminated with light, not a light source, what you are seeing is the reflected light.
Thanks for sharing!
I feel like I knew this. Intuitively because my parents have a fence and it would get wet and would only start evaporation when the sun came up. But the temperature hadn't really changed enough in the air to be only caused by heat from the sun. This is a tremendous breakthrough.
It's not JUST about heat; it's also about atmospheric pressure and relative humidity. And "light" and heat are just different wavelengths of the electromagnetic spectrum. From everything I've ever heard, or read, the water molecules don't care whether the energy comes in the form of light or heat. It's the total energy applied to the water molecules. I'd like to see more on this.
Yep, water does not care ithe energy comes from heating, or from hitting ;) hitting it with a photon.
Theoretically if one had really small hands, they could grab these bundles of water-molecules themselves and throw it up in the air.
It can even come from kinetic energy. Cigar stores have rooms where fans slam air molecules into a container of water. The air has sufficient kinetic energy to break the surface tension of the water and to force it upwards into the surrounding air.
@@chrisfleischman3371 Absolutely. drying my bathroom (sometimes full of wet clothes lines) is the most efficient when I put a fan in there. I have a fan in the wall pushing out the moist air, but that air flow is to small to be of huge help. The big table fan flapping the clothes around does the job ten times faster. But is ten times more powerful. So in the end the question is about how much energy requires every method? boiling?, filtering, or evaporating with wind light or whatever. By now the filtering, I mean reverse osmosis, at large scale is quite cheap. I hear that is 50 cents per ton. In my region the official price of water is about ten times higher, even the water is collected from a river and filtered with standard method, like sand filters, and chlorinated. So, in the end, here making the water cheaper for the consumer is about better administration, not better technologies. I mean getting rid of corruption. So yeah, new technologies may be just interesting and fun to discover, but not so helpful unless are really huge breakthroughs.
Now, the thing that sticks out to me the *most* in this is actually how it relates to Migraines.
Because there's _also_ a body of preliminary research that suggests certain frequencies of light can help aleviate Migraines, reducing occurance and intensity. Exposure to a few hours of a particular color of light, in absence of all others, per day showed a significant reduction of Migraine symptoms compared to broad-spectrum light. And take a _wild guess_ as to what frequency of light was used in the study...
...
...
520 nm, the _exact same_ green light discussed here regarding evaporation.
This is a really interesting discovery, could see lots of new technology that can adopt it😊.
Great video
First time watched your video. And subscribed. Very good animated explanation ❤❤
Well, this phenomenon would certainly explain why dense forests tend to cool down the air and induce precipitation.
Think about it: if the forest canopy is absorbing most wavelengths from the spectrum except for green light , and is in fact reflecting it; that means that by clear-cutting entire areas we are reducing the amount of water that evaporates and precipitates and thus, getting more heat to the surface with less evaporation.
oh that's SO interesting, right! I hadn't considered that but there's definitely a cool in the air ... and that 45 degree component, maybe its heightened at certain times of the day... fascinating stuff right?
If green light is optimal for the photo molecular effect maybe there is a connection with photo synthesis. Just a thought.
This effect (while obviously it would play a part the system as some portion of evaporated water was evaporated by this effect) is not necessary or sufficient to explain forest climate effects, but your connection between green of trees/plants and this effect may still be significant.
*This form of evaporation is unnecessary to describe those effects and would happen with a thermal evaporation model as well.*
Cooling and transpiration increasing humidity levels (which can induce precipitation) were already results in a traditional thermal evaporation model. Thermal energy is transferred to water molecules that when they have enough escape as water which means less thermal energy in the tree and more in the fluid atmosphere which can be carried away (standard evaporative cooling). This extra water vapor is then the driver of induced precipitation.
*That effect is not sufficient*
You may not have been implying this but just to make sure, the method of action of cooling (both actual and perceptual) and induced precipitation were not previously unexplained/mysterious. The general mechanisms have been understood for a long time.
*Your statement is still interesting*
While less revolutionary in understanding those phenomena that you mentioned, the fact that plants reflect green light may still be related in part to this effect. It could be a factor but I would be careful about jumping to that conclusion.
This explanation would only make sense if reflecting the green light decreases the likelihood of this interaction occurring on the plant. Given that it is a surface interaction (i.e. the effect happening further inside the plant would not cause evaporation because the water is not in a position where it can leave the plant) reflecting the green light rather than absorbing it may actually increase the incidence of this effect (absorbing the light with a pigment would reduce the number of times the light passes through the surface of the plant).
Compound this with the information that:
- Not all plants (or more generally green photosynthetic organisms) are in areas where transpiration is a negative thing--thus this selection pressure would not be present for aquatic plants or ones with excess or sufficient water supply. We know that there are shallow water green alges that have been around for a long time (which would never have a reason to limit transpiration because they are literally swimming in water).
- There are other fairly well researched reasons that plants may avoid using green light. For example that structures that absorb it (with green being the peak output of the sun for terrestrial/shallow water) would have harvest too much energy which could cause damage or disruptions (basically over charging things which is dangerous). This research that looked into this model of 'moderating energy capture' and it apparently fit even with things like purple photosynthetic bacteria (because the spectrum of light reaching them was different).
@@BertWald-wp9pz Plants light collection systems actually tend to reflect green light (that is why they are green). In other words plants rely more on other colors for photosynthesis.
@@TwoBitDaVinci the 45 degree component: we are on a spinning sphere that is axially tilted at around 23 degrees. During the summer, mist rises as the sun goes down, and dissipates as the sun comes up. There is very little heat during these times, but there is a photon source coming in at an angle... awesome.
Great video, ty. A suggestion... scientists need much more recognition for the value they are bringing to society. Contrast the attention actors and athletes get, it boggles the mind. I think you should promote the individuals responsible in your videos or at least cite them somewhere.
thank you for the comment and suggestion. We have some rules but what we need to do is create a standards format so we can do all the things in every video... you're 100% right, and we normally always do! but this one we started getting ahead of ourselves on research and missed this step. I have linked the original article from MIT in the description!
I am so impressed and got goosebumps on my arms because I just wondering same question recently…
I really enjoy your videos. You are a very good presenter. The subjects are thought provoking. Of all your body of work how many actually become available and are used to make our lives better?
Holy moses! That is why blue and red LED lights are used to grow plants in underground farms instead of the green LED.
It is because chlorophyll doesn't use green light and reflect it, that is why plants are green. Though the probably does bring side effects which may or may not have been evolutionary pressures.
Green spectrum is reflected from plants. So no use.
This is shown in backyard clotheslines. Clothes dry very much faster in sunshine. This happens even in cold air.
Because you have warmth from the light including IR and UV and wind, it doesn't work in damp air. 😂 This why you get sunburnt on snow, the light is reflected and burns you, this has been known for centuries.
Oh clothes lines are illegal in California.;-) if you nice in all too common neighborhood with nasty homeowners association.
@@grumpystiltskin the land of the free
Given that it happens. it certainly would happen on a clothes line, but there are many other factors at play in those cases. I would hardly call a clothes line a controlled enough environment to tease out the relative effects of different evaporative processes (especially when they inherently are linked--sun light also heats clothes which would increase thermal evaporation as well).
@@grumpystiltskin simples, don’t live in California. Physics and science work better outside Newsom’s head
Awesome summary, thank you! Makes me want to build a new style evaporator with lots of green leds aimed at a thin film of cascading water with a fan blowing air over it!
Great video, very well put together! Have you considered time stamping your sponsorships?
Superb presentation. One of the best cutting edge science explanations I have ever heard. I live in the humid south. I have always admired arid western "Swamp Coolers" which cool air through evaporation. Drying humid air with light to cool it, has major potential.
thank you Chris for the kind words.... swamp coolers ... now that's interesting... because of the potential for cooling there's some synergy, but it would increase humidity and in the south you definitely don't want that. Capitalizing on this phenomenon would be great in dry warm places like the southwest
@@TwoBitDaVinci
I listened closely to your discussion starting at TM 9:30. Yes, the resulting air is cooler and more humid. For humid climates, all that needs to be done is to use an air-to-air heat-exchangers. Depending on the Delta-T, cooling the incoming outside air should cause condensation. Thanks Again.
@@TwoBitDaVinciOf course in a race between evaporative cooling, AC, and heat pumps. At this time good heat pumps win.
Just have think with Matt Farrel just did a video where MIT used this process to desalinate water.
I was going to that one next!✌️😎
Just have a think is not Matt Farrel
I just love this channel even though I don't undestand som of it. I'm 87 and still learning!
Thanks for this man
CSIRO literally were on ABC over a decade ago reporting this, how is this news?
I should add that Australian farmers for years have been covering water troughs because of this exact reason. It was literally a government campaign
POST YOUR SOURCES!
Edit: yay, we have sauce!
so sorry we had a little drama with the render on this and had to replace it but the site to the MIT article is in the description!
Ok Karen.
@@TwoBitDaVinci Thanks! :D
Excuse my enthusiasm, this video genuinely excited me because I too can see its massive potential.
@@BloodAsp you also could just have googled: MIT photomolecular effect
@@NeoKailthas That's fair, but I'm okay with that, thanks Neo.
Throwing in a little styropyro “Pretty cool right?” was not lost haha
haha
Thank you for the very detailed and concise exciting discovery!
I love that we are always learning new things about the world we live in by science. The science is never settled! We are always refining it and fine-tuning things. We try to find the most obvious explanation for things that we observe in the natural world. But later on, we often discover our initial explanations were wrong or incomplete. That is why it is so dangerous to use the phrase "the science is settled" to enforce the will of the government onto the people.
👍
Probably explains why my pool evaporates less water when its green than the need to keep topping it up when it's clear??
We've been doing it wrong. Our pool tiles/linings need to be emerald green, not white or light blue. TBH I may have seen one green pool in my life. It may take a culture shift. ✌️😎
I’d always put that down to the fact that I kept the pool clean, filtered and chlorinated during the summer months but let things go over the cooler months when the pool wasn’t in use. But hey, who knows 🤷🏼♂️
@@erinmac4750I’ve seen 2 green pools, both in architecturally designed homes. They look awesome. You would expect them to look like a pool that hadn’t been cleaned for 3 years, but they actually look nothing like that. The looking really cool, refreshing and inviting.
@@erinmac4750 Lets do it, every day will be St. Patrick's Day down by the river and the pool.
I have been explaining this to my kids and school teachers this. I figured it out 5 plus years ago, and it is sad that I figured it out before you and scientists.
it's even more sad that you don't have a patent, product and a billion dollars,... Doh!
Just picture a stream running through a forest on a warm sunny day and you have got exactly this setup.
of course the video length is 11:33, as the light refraction index of water is 1.33 well done
This sounds extraordinary. There are many inventions which will come from this.
Sounds like Nobel Prize material.
yeah totally agree
You nailed it! I want to experiment already.
That light can break bonds? This is well known in physics for decades..
@@AmericanDiscord specific light, breaking specific bonds. Yeah, I know you knew that too, but just think, the Green Lantern might be cool again, someday... maybe?
Incredible explantion, thanks for sharring!
Considering that I learned of this phenomenon 47 years ago in school, I’m guessing that this new explanation for it won’t really solve the world’s water problem.
What's super cool about this is that we can engineer this effect to make evaporation (which is VERY energy intensive) require much less energy input, and more efficient by not wasting energy as heat.
I mean, can you imagine a lamp that you just point it at your clothes and they dry up almost instantly without even warming you up? And it's green visible light so it's totally harmless!
I'm imagine friends visiting, wondering why the green light is on..."Oops, I was just drying my clothes!" ✌️😸
The video literally said you can't do this - conservation of energy is not broken, you're just getting the energy from a different source. Anyone claiming to have invalidated conservation of energy (Unless they're talking about red shifting light due to the expansion of interstellar space, which does appear lose energy rather than conserving it), is either a con artist preying on the scientifically illiterate, scientifically illiterate themselves or both.
Another advantage seems like it could work on flowing water since the light is targeted on the molecules it interacts with at the surface, whereas heat needs to dissipates throughout the bulk of the water before evaporation can reach its equilibrium. This also implies that the initial energy savings is even greater.
@@riderpaul No it doesn't evaporation always happens at the surface of a liquid. Just blow dry air over it and it'll evaporate room temperature water all day. Make the air warm for even higher effectiveness - you know, like a hand dryer...
I literally can't stress enough that there is no energy saving in this. Whatever method you use to evaporate a certain mass of water will require exactly the same energy because this value is literally a fixed property of water.
I could imagine a Green Laser or LED set up to replace electric dryers... maybe even something 'powered' by firefly light [luciferin]. ;-)
Great work ❤
Thank you so much!
WOW! This is truly exciting news!
Thank you for this fruitful video brother I’m a fan even my kids love your channel now
Maybe I'm just weird, but one of the first thoughts I had was 'could this be usable to increase efficiency in the production of stem for power generation? '.
oh now that's interesting!
Brilliant, as long as the energy from making steam this way is greater than the energy from the light source. It could work, maybe, especially if the light is from a renewable source.
Brilliant! Combine that with desalination and that would be pretty slick!
The efficiency issues with steam power pretty much all lie in the conversion of the energy in the steam to useful energy like motion or electricity (It's still the best option we have, but the Carnot limit sets an absolute limit on the efficiency with which the energy in the steam and be made into useful work). The steam needs to enter the system with the correct amount of thermal energy and since this new discovery doesn't contradict conservation of energy, there's no reason to think it has any chance of being more efficient than the 90+% efficient boilers already in use.
@@peglor The real question is how the 2 processes would interact. There isn't any data related to that or any indication that it has yet been explored.
You failed to take into account sublimation. Notice the effect of meat drying out in a freezer. No heat or light is needed. When the vapor pressure of water is higher than its surroundings it continues to evaporate until it reaches the saturation point.
MIT took the into account
I have access to a freeze dryer that uses heat (conductive and radiant) to sublimate water vapor from ice surface contained in the food. The freeze dry industry has a strong interest in this technology.
You missed the fact that large scale desalination of water is done in the absence of air. The water is vaporized to separate it from the nonvolatile salt then the vapor (steam) needs to be re-condensed. This new process appears to be more of a microscopic mist generation (like a nebulizer). This mist is generated in a subsaturated atmosphere of air and the micro droplets are further evaporated by drawing heat from the air. Without air it does not work.
You are right, for example the evaporation of water in a pond in the summer is most dependent on the relative humidity and of course the wind speed.
Here too, the vapor pressure is an important factor in the same way and only a higher temperature has less effect.
I would like to see the experiment showing that photons alone make the water evaporate much faster, so how exactly did they compare this evaporation.
This man says that with the same amounts of energy of light compared to "heat", the water evaporates 4 times faster.
If you want to evaporate 1 liter of water on a stove, you would have to compare that with photons that hit a very large surface of water. Photons
have much less energy per m2.
I'm curious what this experiment looked like.
I’ve never thought about this. So a pressurized freezer would preempt meat from this?
This always just seemed obvious to me. Glad we finally got there.
Thank you So much negative going on everywhere but this news of the discovery brings back excitement in the possibilities of a brighter future. Thank you for sharing.
It's very important to notice that the molecular weight of water is substantially smaller than the molecular weight of the gases in the atmosphere. It is already remarkable that water is a liquid at room temperature. This suggests that you don't really need much energy to liberate water molecules from their aqueous environment. You just need to disrupt the hydrogen bonding in some way.
Water has a molecular charge orientation which makes it align in a very strong way. This makes it denser than air which compared to water is more charge balanced in relation to its peers. Denser of course means it tries to push lower in the gravity field. But, that is an interesting observation none-the-less.
@@gonegahgahclouds are water vapor and they are certainly not denser than air. What am i missing?
I believe there is additional energy needed to heat the water. It will be cooling while the laser evaporate the water. The air cools then that also cools the water. 9:30
The uneven charge across the water molecule causes the molecules to bond together far more strongly than molecules with a similar atomic weight but more even charge distribution. The OH group that defines alcohols also creates this dipole, keeping alcohols liquid at room temperature too. Water requires a huge amount of energy to evaporate (It take far more energy to convert a kg of water at 100 C to steam than it does to heat the same kg of water from 0 to 100 C). That's why steam is such a good way of transporting heat energy for power generation.
@@swarsi12 They don't stay as vapour. "Rain" is what you're missing... What causes them to gather as droplets?
Truly a great discovery. The need for more clean is a great challenge. Hopefully we will see practical results sooner rather than later but results we will see.
Man! Cool video bro! 👏👏👏👏👍
Its been many decades from my education but wasn't there something about the vapor pressure involved in this little circle
This is groundbreaking. To think that we could still learn about something as common and mundane as water evaporation... Can't wait to see how they turn this into actual technology.
My dad didn’t have a fancy name for it, but being 2 generation excavator, and contractor he knew that having filter beds in direct sunlight would pull the moisture out through the ground increasing the efficiency of a filter bed.
This is exciting stuff!!!
The science is never settled. Any expert that says otherwise is either intentionally or unintentionally wrong.
every climate change alarmist ever
This one of the most irritating phrases (the science is settled) to me because it’s the equivalent of saying we know everything there is to know and that is ridiculous, and smacks of pride and ego beyond comprehension.
Only a fool would think that
‘Settled’ just means that ignorance is at a local minimum.
that's what makes science so useful, by design, it asks to be challenged and to dig deeper, rather than be punished for refusing to change the reasons for a thing when better (more comprehensive/more accurate) reasons/theories are presented.
Tbh the entire thing is basically "oh hang on, we found another discrepancy between our model and reality".
That's all this "maximum rate" really is. It's not even about the model that describes the basic process, but about an applied spreadsheet.
The assumption in the applied model was not entirely correct. Whoopteedoo.
As for the explanation, liquid water is not a rigid unmoving structure, and the overall rate of evaporation in general is a balance between rates of evaporation and condensation at the surface, plus more distribution shenanigans at the boundary area.
So basically the whole explanation shows why we don't often hire US students for hard science.
I would have guessed that like with temperature, since water has an higher relative humidity percentage would "leak" it in drier air in an exchange to find a balance, but I was obviously wrong lol
pretty fascinating right? I love that there's still so much for us to learn about ... what a world!
actually you are right, the tendency to evaporate is the water vapor pressure and it is directly related to the temperature. Water will evaporate in dry air until it saturates it, EVEN IF IT IS COMPLETELY DARK. This photo evaporation effect could be responsible by part of the evaporation but it is definitely not the main reason. Molecules have a distribution of velocities at a given average T, some are very fast other very slow, faster ones at the surface can escape to the air, some go back but most go away carried by air currents. The surface cools down (slower molecules remaining) but after exchanging heat with the surroundings it regains the original temperature and it all repeats until air reaches it saturation limit at the given T. If you leave a cup of water in a dark place with openings it will all evaporate.
Main question is : what % of evaporation is photo effect responsible for ? I don't think this photo effect could improve by much the current inexpensive solar desalinization pool process, since green light is already part of solar light.
@@Ed-bj5eqI dont think you can quantify it as a percentage, the percentage iabprobably between 0 -100% dependingbon the conditions...
And yes, solar light is "free" so the implication are more about evaporating water WITHOUT solar energy. like:
-a dryer using green light instead of heat
-a heat pump that would use water as refrigerant, evaporating it efficiently with green light, removing heat, and condensing it to release heat
@@geemy9675 if you have to produce green light, as with a laser (inefficient process), then transforming that same energy into heat by Joule effect (electrical resistance) is still more efficient, so you will have to consider the energy loss from the laser (it loses most as heat). But lets assume that you have available E1 energy amount in green light and the same E1 as heat, now input this same energy in two separate containers with same water amount, same initial conditions, and check the % of water evaporation from both and compare green light photo-effect vs Joule effect. Also, you could check that in a different experiment with one container : EXP 1 - heat, in the dark, a volume of water V from T1 to T2 (below boiling point), or leave the heater on for a given time t, measure how much water evaporated. EXP2 - do exactly the same but this time also shine green polarized light at 45 surface angle and check how much water evaporated this time. Then if the difference is worth it you will worry about how to make artificial green light in an highly efficient way
Amazing! Thanks!
This is awesome, I will test this too.
Watching this at 5 a.m. with no sleep, and seeing that the video was posted just an hour ago, made me feel so happy that I hadn't gone to bed yet.
I saw it at 5:01 AM upon waking up, after prayer, mind you. o7
I'm not a scientist, and I'm way too dumb to figure it out myself, but I have always found it strange how water could evaporate without hitting its boiling point.
Evaporation happens when molecules are bouncing around fast enough to start flying away from other molecules. Giving them energy in any means does this like you can run an electric current through water that takes it to another level seperating hydrogen gas and oxygen gas.
Anyway so the water molecules just need energy, and the energy of molecules expresses itself as heat. Heat is just the measure of hoe much energy molecules are holding at the moment. Imagine the molecules sre vibrating, that vibration is heat.
So you can give them heat directly to do this or give them the energy from another source like in this video finding our we can give them the energy from light.
And even though we're not using heat to accomplish giving them the energy for evaporation those molecules that evaporated will still express their newfound energy as heat.
So you're not entirely wrong, heat is still going to occur but as a biproduct rather than as the means to trigger evaporation.
So we can evaporate without introducing our own heat and cause evaporation with heat but heat will be present in the aftermath since the evaporated molecules will express their energy as heat to stay in that vapor state.
Basically light is donating energy to the molecules and then they express that energy as heat so the water molecules are generating the heat within themself and evaporating using their own newfound energy on their own rather than us introducing heat from an outside source.
Heat is still involved as that's the basis for being in the vapor state or liquid or solid states, just we don't need to bring our own heat to the equation that requires a huge ammount of energy to desalinate large amounts of water for poor countries. This breakthrough makes it so much cheaper and faster that we should potentially be able to provide clean water all around the world with little cost and resources now.