As a particle physicist (25 years retired) I learned all about the properties of light and it’s dual properties simultaneously but never thought I would live to actually see it in literal visual motion. My TH-cam experience is complete. I can die fulfilled! (Not sure if I cried or wet myself..can’t remember now..but it was quite moving!)
From what I understood (with a wikipedia article on the streak camera and a news article on the whole setup), the streak camera is the one in charge of recording the change in light through time. It is constructed in a way that, as the thin streak of light enters the camera, it gets deflected on a different part of the camera sensor depending on when the light entered the camera. The image the camera produces is a 2D image, but each line of the image represents the same line that was recorded, just at a different point in time. This way, they're able to record a thin streak of light at a very low temporal resolution. However, the resulting image quality is very poor, so they use a secondary camera that records a still image (i.e. a single frame). Then they use the data collected from the streak camera and combine it together with the still image with a mathematical method called a Radon transform. This enables them to effectively reconstruct what the movie would look like as if it was taken with a single insanely fast camera. I don't know what the whole encoding business is about, but the article I used as my source is 6 months old, so maybe it's some sort of improvement. Or just something not mentioned in the article.
It's probably patented so he won't release "how it works" But I heard you can't build a recorder that records at the speed of light as that violates the information paradox. The fastest detectors operate bout 1million fps. So what I suspect is happening is that the femtosecond of exposure is stretched out by diffracting it along a series of mirrors, until it's "slow" enough to be recorded. Rather like stretching out pen marks on a rubber band. The "information" is retained but "longer" so now can be recorded.
What’s fascinating about the Femto second lasers is they are SO fast that when a material is cut by the laser it leaves NO heat affect zone as if it had been cut cold! MIND BLOWN 🤯
@@Mobin92 This Process is unique to certain materials, like diamond so i will use that as an example. It is because of the unique thermal conductivity properties of diamond combined with the speed of a femtosecond laser and the extremely short wavelength of femto lasers (typically in the UV range - 355nm). These types of systems do not operate under a continuous laser beam but rather a chain of extremely short pulses. The time unit of measurement between each pulse is measured in Femtoseconds. When the laser pulse hits the diamond, the carbon lattice structures heat up and are ejected. Between successive laser pulses, the carbon lattice has enough time to cool down so there is no heat affected zone around the surrounding area which has been cut by the laser.
@@Mobin92 the laser does in fact produce heat, It’s just that because the femtosecond laser is so fast (The amount of time the laser beam is on vs off between pulses) The material has time between each laser pulse to cool down
By the way, the binary code at 2:37 literally translates to “Plannet Slo Mo Easter EggPlanetSlo Mo Easter Egg”. Didn’t see any comments on it so I thought I’d put one. Pretty neat...
Andre Weeb I know obviously he didn’t take 30 classes to learn binary and just translate that for us... I’m saying why did he take the time to type that into a binary code translater, for all he know that could have been nothing 😂
Abtin you’re right. I didn’t take a bunch of classes to read binary. I just put it in a binary translator. My literal thought process was, “they put binary there that looks like it could be something. Let me check” and so I did. If it turned out to be nothing, I wouldn’t have been angry. I probably would’ve have just been disappointed at the wasted opportunity.
The analogies you guys gave to the rates of time are brilliant and I will use those! I love how you break down advanced concepts and make them understandable to everyone. It is one thing to know how something works but a completely different skill to explain that knowledge to someone else. This is a BRILLIANT channel! +1 sub!
This was rather used to illustrate how *short* forever feels, if you're already dead. Not that there are infinite real numbers b/w 0 and 1 (so you wouldn't stop counting).
explanation unclear i want to know how they manage to record binary numbers as fast as light speed even we know the best electronic is like snail compared to light
He never really said any thing that links it to bridges the boundary of how to filming light faster than light. All he said was the light from the object is bounced off a mirror and sent to a camera but somehow digitized before it got there. Wha?
At least MIT's camera takes just one instance per laser pulse on camera in 1dimension. This is then done again and again to stitch complete picture. This is possible because every laser pulse is similar thus you need only to know at what point in time take the other pics. They have good video about it
I'll be honest, as much as I'd like to understand how you can film the speed of light, I don't think any amount of explaining will get me there. I don't even really understand how the Phantom camera works, to be honest.
According to the special relativity the speed of light is equal to the speed of dark.... So there is no need to do that by the way... I think they could try with an electron ..in macroscopic level... #slow-mo...😇
It took two years for YT to recommend this video to me. That's like returning from Mars and having my "Polaroid's" of the trip arrive in the post 6 months later. (Hmm, Premium subscription?) Of course, I only contemplated this since being Light Speed savvy thanks to The Slow Mo Guys. :)
As I listened to the possible noble applications of this discovery/invention , I could''nt shake off the realisation that this will inevitably be used in the life taking industry(military)
You guys broke this down perfectly! Thanks for helping us visualize how insanely fast the speed of light is! Really puts the scale of our galaxy into perspective considering it takes light over 100,000 years to travel across it!
Cosmologists consider a few MILLION lightyears to be really close on the scale of the visible universe. The gravity wave observatories are now routinely detecting blackhole mergers estimated to be over 1 BILLION lightyears away. The EHT (event horizon telescope) just recently released an image of a supermassive blackhole roughly 56 MILLION lightyears away. We're privileged to be living in a time when time-scales of femtoseconds to billions of years are accessible to us. We are simultaneously eternal compared to the femtosecond and unimaginably brief compared to billions of years.
I get a feeling this camera must be precise enough to capture the exact frames it needs to capture. It captures trillions of frames a second, but it probably only captures for way less than a nanosecond of realtime footage.
WoooW Again, I insanely love your videos because in every video the fact that the Camera is insanely fast and that X f/s is insanely many frames per seconds and how insanely short is the timing between the frames, really blows your minds in every video in every experiment your minds get blown by these facts hahahaha ,,, love it :p
I actually saw the flashlight come on and apperceived the paper light up!! It took me four replays to catch it. Lots of light on the screen you used. Glare is bad. But cool 😎.
Years ago there was a Navy Admiral that started her class by giving each student a wire the length that light travels in a nanosecond (about a foot). Whenever one of her students wasted a microsecond she would make them carry a coil of wire equal to a microsecond. You can see from the numbers in the video how long that was!
@@lorriecarrel9962 What school did you flunk out of? He was studying quantum physics and astronomy, not optical physics. Dr. Lihong Wang is studying a field of physics that wasn't around in Einstein's time, much like many physicists today. The closest thing to optical physics experimentation Einstein did was the Eddington experiment, which still would have made Dr. Wang's equipment useless.
so interestingly that the most view part of this explanation video is not about mr. Wang talking about how camera works at 2:26 but the demonstration part at 6:55. Good job to the team that people only undertand after you guys show an example :)
Amazing! .. the closest to light path I've been was with a Light Field Camera (lytro illum) and it stuns just realising the light beams projections in a volume/field with depth and no focus need (can do it anytime later).. but this.. got me speechless!
I don't think it would matter, as the camera is still "viewing" the photons, which is part of the anomaly. The speed of the camera wouldn't explain why the photons react differently to being watched.
I Think they did, if you look More videos of the femtosecond camera, you can see some weird stuff about how they see things behind a wall. The double slit experiment not, but some sort of that. I remember, is how a beam of light spread on an apple, and they visualice some wave behavior by quantum effect in the shadow.
The double slit experiment relies on firing individual photons, which this camera couldn't detect, as capturing the image required having some way to scatter the laser beam's multiple photons into the camera (the milk or a lens, for example.) Now that I say that, I suppose you may be able to fire the photons directly at the camera's detector, but that would only be able to tell us when they arrived, not how they traveled, since you'd need a view from the side for that. As we're already firing individual photons, time of arrival would be useless information. EDIT: This is also assuming the camera has the resolution required to resolve individual photons, which I doubt it does given the video quality shown.
Oh! I know about LiDAR from historic preservation surveying to see through foliage and stuff, but I’ve never actually seen it brought up in anything else! I’m not a big physics person, so I guess a lot of the technology behind it and other possible uses I forgot about. That’s really cool!
This makes me wonder, there are several videos on TH-cam stating that it is impossible to measure the speed of light in one direction, but would this process allow that measurement to be made since we are capturing the lateral movement of light in a single direction - question for Veritasium and others...
Interesting question! From what we know of relativity though the answer is no, the main constraint to measuring light in a particular direction isn't a fast enough camera it's that the time elapsed in a particular direction is contingent on the relative velocities between the observer and phenomenon when the observation is being made. For a visual example of this check out en.wikipedia.org/wiki/Time_dilation#Time_dilation_caused_by_a_relative_velocity You can see on the left when the observer is at rest we get a certain time and distance elapsed but when the observer is in some relative motion to the event being the time elapsed is increased. Even though for the light's purposes it's still moving the same vertical path it was going through before, for the observer the light is now moving through a longer, diagonal distance over a longer time.
The answer to measuring the speed of light one way is far simpler than we need relativity for, even if it is a factor. The signal to the receiver goes at the same speed (or slower with electronic component interfacing or computer language translation) as the light we're trying to measure between two points. Mind we're only trying to record the difference in time, not a picture of it as was done in the videos here. The light gets to the receiver before or at the same exact time as the trigger signal saying "start recording the time now." The time recorded by the target device in this scenario is always zero or negative. A negative result only tells you how delayed your data is, not the speed of either the light or the transmission. There is no workaround to this without quantum tunneling of some sort linking the emitter and receiver into an instant connection that defies proven and useful physics on any scale above subatomic. The only way to directly record the speed of light is with a reflection back to the source device, (which started its own timer,) then divide that time by the round-trip distance. That being said, we can (humanity can...I certainly can't myself) reasonably record said speed from the side as was done here, with devices that are independent from the light's source or target, and a helper medium to make the light visible from the side. That measurement, however, is fallible due to perspective and distance. In the bottle demonstration, light is also refracted by the bottle's shape. (And why couldn't they remove the label!?) This is kind of a good-quality middle point between accurately measuring the speed of light, and measuring the speed of data like the common demonstration of waving a laser across the sky. (In the sky, one side of the arcing motion is billions of light-years away from the other, but you haven't made the light move that fast, nor perceived at that speed.) All this is not to say the video is inaccurate or not really amazing. It's just measuring the speed of light in our perspective, not the direct rate of travel. The speed of playback also completely changes the apparent amount of time, but that's down to trust in the technology and presenter.
That's the beginning of what I wanted in this video. Demonstrating the time scale is fine, but I got that already even if I don't know the factors offhand. The lenses were interesting, but...I really want to know how the camera takes that many frames per second. I suppose it's a similar signalling system between the camera and laser, for both to be so short and precise.
You know, if there was way to combine: 1. The electron microscope that lets you see atoms, 2. This camera that lets you see down to the speed of light and 3. The Large Hadron Collider. You would be able to see atoms break down into their elementary particles. I don’t fully understand the science behind all these devices but if the first two could be combined together somehow and placed in the Large Hadron Collider, that would be really awesome!
I don’t fully understand how we are able to see certain stars and galaxies from here on earth with our eyes…yet impossible to ever physically get anywhere near them🤔 Space time is so different then anything most people can truly comprehend . The time the universe evolved compared to time we as humans have spent on this planet is almost confusing…We still haven’t explored 100% of Earth…And to think a few HUNDRED years ago people were using animals for transportation while the only available light after the sun went down was the moon and stars in the sky…unless a fire was involved. 🫤
@@MaRkYWaHoO "I don’t fully understand how we are able to see certain stars and galaxies from here on earth with our eyes…yet impossible to ever physically get anywhere near them" We are small, but the galaxies are far away. Small... Far away...
Seeing our brain sending electronic signals in a slow and understandable speed is absolutely freaking bonkers. This could open up a terrifying amount of doors in science! In multiple fields to. Imagine watching light be absorbed and turned to chlorophyll in thirty seconds with this clarity. What if you hooked this camera up to a particle accelerator?
If you can film at 200 000fps, it means light can travel 1500 meters in one frame... If you set up 2 mirrors at 750m and 1500m and shine at them, you should be able to see difference :)
It's great how you use your TH-cam platform to do interesting things and educate many like me. I know you like doing this and it gives a lot of money but still making informational videos helps the intriguing students to learn a lot. So thanks Buddies 👍
Having an interest in radio and electronics from an early age, I suggested once, that if we could see Radio Frequency/ Electromagnetic waves, that we likely could not see our hand in front of our face, because of all the various RF devices, which have only grown in number, since I first thought of this. Now seeing this, I have to wonder if a little tweaking may get us to that point ? Mind blowing !
For perspective about light speed. At the speed of light you would travel Around the Earth almost 8 times, within a second. It takes roughly 60-70 hours for us to do it once. (about 252000 seconds) It takes about 7-10 minutes for light to travel from the Sun to Earth. Mars from Earth takes anywhere between 8-20 minutes, because of orbit variation. Closest star to our is Alpha Centauri, it takes over 4 years for Light to travel, it would take us over 100 years, if we get from 0 to +13,000 khm. In another words your grandchildren would enjoy Alpha Centauri before you would get there. Light is fast. Bit too fast to truly comprehend for us, but try to imagine all of this. Keep in mind, all of these are rough estimates not 100% facts, but do the research, its impressive.
What is crazy as well is that all of that is refering to the speed of light in a vacuum. The light we saw in the video, isn't quite as fast as the speed you mentioned but, it is still on the same scale. If light is traveling through a medium, it is possible for objects with mass to travel fast than the speed of light, creating a "optical boom" (this is called Cherenkov radiation".
Light is fast and we can hardly comprehend it, but then think about the distances it takes to make light have a 4 year commute. Then you go up in scale and realize the milky way is thought to be just over 100,000 light years in diameter which means it would take light 100,000 years to go from one side to the other. How long would a video of light traveling across the galaxy shot at 10 trillion frames per second be?
eightfreak888 my mind cant comprehend the fact that even for light if would take 100k years to go from one side of our galaxy to the other . im trying to wrap my head around how big our galaxy is .... & its just one out of many galaxys in a even bigger universe that holds them all ... my God ....
to make your numbers more precise: travel around earth: boeing 747: 570 mph, 43h 41m concorde: 1341 mph, 18h 34m sr-71: 2455 mph, 10h 8m ISS: ~17000mph, ~ 1h 30m sun to earth light travel time: ~ 8m 19s
What’s fascinating about the Femto second lasers is they are SO fast that when a material is cut by the laser it leaves NO heat affect zone as if it had been cut cold! MIND BLOWN
Neverending Story 2, there was a line in there saying the speed of darkness is twice the speed of light. obviously used as literary flavor text to describe how fast the villainous armies were, but fun to think about
Perspective: Say the footage at 3:30 was filmed at 1 frame per picosecond (1 trillion frames per second). It took the laser roughly 1900 picoseconds to move across the water bottle. If you were to watch a full seconds worth of real time video filmed at that speed at 24fps, it would take roughly 2.5 million years to finish the clip. (At 1fps it would take roughly 60,200,000 years to watch)
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As a particle physicist (25 years retired) I learned all about the properties of light and it’s dual properties simultaneously but never thought I would live to actually see it in literal visual motion. My TH-cam experience is complete. I can die fulfilled! (Not sure if I cried or wet myself..can’t remember now..but it was quite moving!)
Aww even i dream of learning quantum physics and relativity as a teen
Did you retire to pursue farming ?
Dear sir people like you are experienced and this generation needs your suggestions.may god bless you and give sound health
Hy
Truly beautiful, thanks for sharing your experience and background.
Thanks Mr Hong. I still have no idea how your camera works.
😂😂
😂😂
So true I didn't understand a thing
From what I understood (with a wikipedia article on the streak camera and a news article on the whole setup), the streak camera is the one in charge of recording the change in light through time. It is constructed in a way that, as the thin streak of light enters the camera, it gets deflected on a different part of the camera sensor depending on when the light entered the camera. The image the camera produces is a 2D image, but each line of the image represents the same line that was recorded, just at a different point in time. This way, they're able to record a thin streak of light at a very low temporal resolution.
However, the resulting image quality is very poor, so they use a secondary camera that records a still image (i.e. a single frame). Then they use the data collected from the streak camera and combine it together with the still image with a mathematical method called a Radon transform. This enables them to effectively reconstruct what the movie would look like as if it was taken with a single insanely fast camera.
I don't know what the whole encoding business is about, but the article I used as my source is 6 months old, so maybe it's some sort of improvement. Or just something not mentioned in the article.
It's probably patented so he won't release "how it works" But I heard you can't build a recorder that records at the speed of light as that violates the information paradox. The fastest detectors operate bout 1million fps. So what I suspect is happening is that the femtosecond of exposure is stretched out by diffracting it along a series of mirrors, until it's "slow" enough to be recorded. Rather like stretching out pen marks on a rubber band. The "information" is retained but "longer" so now can be recorded.
Veritasium: You were never actually measuring the speed of light, but the 2 way speed of light.
That's why it's almost impossible to measure the 1way speed of light
Peyooooom bap
I don’t know how to type an outro song, leave me alone
Which is the speed of light.
#shambhu panbit meve submit to for follow p.m. media voucher key nai mela mount off key 😭😩👈👉hateu hateu 😭🙈🤧😤😩🙈😤🤧😋😜🤧😤👈👈
@@Eddie-jr6bs not quite.
What’s fascinating about the Femto second lasers is they are SO fast that when a material is cut by the laser it leaves NO heat affect zone as if it had been cut cold! MIND BLOWN 🤯
How can that even be from an energy conservation standpoint? Does it produce some other radiation instead of heat?
@@Mobin92 This Process is unique to certain materials, like diamond so i will use that as an example. It is because of the unique thermal conductivity properties of diamond combined with the speed of a femtosecond laser and the extremely short wavelength of femto lasers (typically in the UV range - 355nm). These types of systems do not operate under a continuous laser beam but rather a chain of extremely short pulses. The time unit of measurement between each pulse is measured in Femtoseconds. When the laser pulse hits the diamond, the carbon lattice structures heat up and are ejected. Between successive laser pulses, the carbon lattice has enough time to cool down so there is no heat affected zone around the surrounding area which has been cut by the laser.
@@Mobin92 If you are interested in understand the science behind this process i recommend Ron Schaffers youtube channel, Photomachining.
@@Mobin92 the laser does in fact produce heat, It’s just that because the femtosecond laser is so fast (The amount of time the laser beam is on vs off between pulses) The material has time between each laser pulse to cool down
How many times are you going to post this exact same thing?
By the way, the binary code at 2:37 literally translates to “Plannet Slo Mo Easter EggPlanetSlo Mo Easter Egg”. Didn’t see any comments on it so I thought I’d put one. Pretty neat...
How do u have that much patience to find that out
Nice
Because most of us dont understand binary code
Andre Weeb I know obviously he didn’t take 30 classes to learn binary and just translate that for us... I’m saying why did he take the time to type that into a binary code translater, for all he know that could have been nothing 😂
Abtin you’re right. I didn’t take a bunch of classes to read binary. I just put it in a binary translator. My literal thought process was, “they put binary there that looks like it could be something. Let me check” and so I did. If it turned out to be nothing, I wouldn’t have been angry. I probably would’ve have just been disappointed at the wasted opportunity.
1 Pico second is the equivelent of 1 second being played across 3,171 years..... that is mind warping.
That's as fast as I leave school when the last bell rings...
Sir can u speak English please 😂?
*correction* equivalent
Imagine the Universe's 13.7 billion year long age... running in Pico time. That would take.... I can't even calculate that... my mind hurts.
1 picosecond to 1 second, is equivalent to 1 second to 31,709 years.
What's even more mind blowing is despite how fast light is, the light from some of the most distant stars takes millions of years to get here.
"Time travel is possible we just don't have the technology"
Yes, 13 billion years. And that's only because we can't see farther objects. Space is vast.
8 minutes from our own sun.
@@guardiandarkness5345 ok then where the time travelers at? i dont see them.
yup. some stars we see in the sky may already have been long gone.
The analogies you guys gave to the rates of time are brilliant and I will use those! I love how you break down advanced concepts and make them understandable to everyone. It is one thing to know how something works but a completely different skill to explain that knowledge to someone else. This is a BRILLIANT channel! +1 sub!
Mr. Fong: "you're literally watching the slowest slow motion movies right now"
me : click 0.25 speed
What if we used 100% of our brain capacity
5000 IQ
thats a real power move
@@wawowawawo7553 people would still argue if the earth is round or spherical or flat
So you mean we can see the speed of light and then put it up to 200% on replay?
Hmmm!
“Close your eyes. Count to one. That is how long forever feels.”
- Kurzgesagt
I still don't get what its mean
@@yonk3214 there are infinite numbers between 0 and 1. You will never stop counting.
@@yonk3214 for example, 0.0000000000000000000000000000000000000000000001, 0.0000000000000000000000000000000000000000000002, etc.
This was rather used to illustrate how *short* forever feels, if you're already dead. Not that there are infinite real numbers b/w 0 and 1 (so you wouldn't stop counting).
101st like
6:55
@bababooey cringe 14 year old girl
After 2 years, why is this now on everyone's recommended page?
Algorithm speed is much slower than the speed of light. It's imperceptible to the human eye as it's so slow.
4 real
Stop it you bot
"A flashlight turns on too slow"
Let that sink in....
If a tree falls in a forest and no one is around to hear it, does it make a sound?
Mr. Saturday sounds is a human concept, without humans there is not sound
Interesting 🤔
I got another one... if a tomato is a fruit (which it is) so would that make ketchup a jam?
Reuben Travers
His explanation of how the camera works just raises even more questions...
that was oversimplefied explenation, so it could be understood at least to some extent.
explanation unclear i want to know how they manage to record binary numbers as fast as light speed even we know the best electronic is like snail compared to light
He never really said any thing that links it to bridges the boundary of how to filming light faster than light.
All he said was the light from the object is bounced off a mirror and sent to a camera but somehow digitized before it got there. Wha?
At least MIT's camera takes just one instance per laser pulse on camera in 1dimension. This is then done again and again to stitch complete picture. This is possible because every laser pulse is similar thus you need only to know at what point in time take the other pics. They have good video about it
I'll be honest, as much as I'd like to understand how you can film the speed of light, I don't think any amount of explaining will get me there. I don't even really understand how the Phantom camera works, to be honest.
Gavin in intro: " I just feel like no human should ever had seen this"
well, too bad, cause 13 million ppl have :>
8 hours ago?
*Pretty neat*
You guys have a really fun job!
Are you guys going to film the speed of dark next?
VSauce already covered that
Or the speed of push?
@@bedo2524 nothing imposible
According to the special relativity the speed of light is equal to the speed of dark.... So there is no need to do that by the way... I think they could try with an electron ..in macroscopic level... #slow-mo...😇
@@NiallMartin1 great idea
It must have been an honor for you guys to meet the "Slow Most Guys"
Stefan Huber pretty sure if they have equipment on that level it’s the other way around. They are diving much deeper into things.
Pniko r/whoosh
Pniko those guys made the equipment
R/wooooosh
Pniko r/whoooooooooooossshhh
Thank you so much for uploading this video. It is helping me get through the pandemic!
It took two years for YT to recommend this video to me. That's like returning from Mars and having my "Polaroid's" of the trip arrive in the post 6 months later. (Hmm, Premium subscription?) Of course, I only contemplated this since being Light Speed savvy thanks to The Slow Mo Guys. :)
2:39
"Planet Slow Mo Easter EggPlanet Slow Mo Easter Egg"
Nice one.
01010000 01101100 01100001 01101110 01100101 01110100
00100000 01010011 01101100 01101111 01110111 00100000
01001101 01101111 00100000 01000101 01100001 01110011
01110100 01100101 01110010 00100000 01000101 01100111
01100111 01010000 01101100 01100001 01101110 01100101
01110100 00100000 01010011 01101100 01101111 01110111
01100001 01110011 01110100 01100101 01110010 00100000
01000101 01100111 01100111
Here are the numbers if anyone wants to check it out. lol
@@raphaelkap
www.browserling.com/tools/binary-to-text says "Planet Slow Mo Easter EggPlanet Slowaster Egg".
@@EVAUnit4A www.qbit.it/lab/bintext.php Yeah, this site does the same.
I spent 5 minutes manually typing it in and running it through a translator before I saw your comment...
@@albertarason4502 same wish I came here first XD
Professor : You can't see the speed of light because it's too fast
Mr. Lihong : Hold my camera
Doctor
Not original 😁
Sooooooniiiiiiiic????????
Nigerian flim.
Nigerian film
Absolutely incredible.
Thank you.
As I listened to the possible noble applications of this discovery/invention , I could''nt shake off the realisation that this will inevitably be used in the life taking industry(military)
3:30 Light footage
Thank u
Thank you, so much fluff before the content...
Thank
@@testbrand5261 that's bc this is the explanation of the video where the content is
Thanks
You guys broke this down perfectly! Thanks for helping us visualize how insanely fast the speed of light is!
Really puts the scale of our galaxy into perspective considering it takes light over 100,000 years to travel across it!
What are u doing here lol
Cosmologists consider a few MILLION lightyears to be really close on the scale of the visible universe. The gravity wave observatories are now routinely detecting blackhole mergers estimated to be over 1 BILLION lightyears away. The EHT (event horizon telescope) just recently released an image of a supermassive blackhole roughly 56 MILLION lightyears away.
We're privileged to be living in a time when time-scales of femtoseconds to billions of years are accessible to us. We are simultaneously eternal compared to the femtosecond and unimaginably brief compared to billions of years.
That's impossible to know
Wait why the heck does Gryphon have 26 likes on this when he almost has 3mill subs lol
Love his vids by the way
Hello ^^
This is just insane. And also super fascinating
This is so amazing!! Thanks for sharing! Don't understand all the thumbs down on this!
I don’t think I’ve ever seen something so mundane visually that is actually so incredibly mind-blowing in concept.
I would agree. It's interesting to see this stuff because even the most common things are fascinating at some level.
That's nothing. Ive been in hotel rooms so small that when you switch off the light, its still not dark when you get into bed.
The black hole pic
How much data storage is used to save all the frames on?
3 or 4
MrLeGiso yes
I get a feeling this camera must be precise enough to capture the exact frames it needs to capture. It captures trillions of frames a second, but it probably only captures for way less than a nanosecond of realtime footage.
Alexandre Parent yes
Normal People when they so the film think about the camera and how they did that
Me and you we think about the storage 😂
WoooW Again, I insanely love your videos because in every video the fact that the Camera is insanely fast and that X f/s is insanely many frames per seconds and how insanely short is the timing between the frames, really blows your minds in every video in every experiment your minds get blown by these facts hahahaha ,,, love it :p
I actually saw the flashlight come on and apperceived the paper light up!! It took me four replays to catch it. Lots of light on the screen you used. Glare is bad. But cool 😎.
Drop the microphone your done. Although the mic drop would take 345,000 years to hit!
This is genuinely one of my all time favorite videos, the science and technology involved blows my mind
Years ago there was a Navy Admiral that started her class by giving each student a wire the length that light travels in a nanosecond (about a foot). Whenever one of her students wasted a microsecond she would make them carry a coil of wire equal to a microsecond. You can see from the numbers in the video how long that was!
Stay blessed
I like going back and watching things pre-pamdemic to reminisce about slightly better times 🥲
8:50 Queen Elizabeth is indeed a measure of time in England.
oh boy.
Noticed the binary at 2:40- I really don't know what I expected...
Translated: Planet Slow Mo Easter Egg Planet Slow Mo Easter Egg
thanks matt
Woahh
@@duk2k hello brother
show that the non-binary folks, they will be triggered ;D
@@hyperhektor7733 *Woah hey look at me I can read binary haha peasants*
I love them. They're just casually walking in shorts anywhere.
I can't believe this guy knows so much; yet he's so easy going & pleasant
The fastest thing has been slowmoed . Now are you guys retiring ?
Nah, now it's gonna be the fast mo guys and it's gonna be about filming the slowest objects and speeding them up
Woo sh that would actually be really cool but more difficult to find subject
@@kailenswisher9828 they could just film college classes, those stuff are for sure the slowest things ever
@@Fs-zo8ws savage
They filmed the fastest thing but not everything that is fast. There are still plenty of things to film in slow motion😁
Imagine if this was invented during Einstein's time.
Mind blowing
If this thing invented in einstein time i think phone can do it now
Einstein wasn't studying light so I'm not sure he'll do much
@@milesedgeworth132 go back to school lol
@@lorriecarrel9962 What school did you flunk out of?
He was studying quantum physics and astronomy, not optical physics. Dr. Lihong Wang is studying a field of physics that wasn't around in Einstein's time, much like many physicists today. The closest thing to optical physics experimentation Einstein did was the Eddington experiment, which still would have made Dr. Wang's equipment useless.
Amazing!! Imagine if you could magnify to a similar level and record what happens
Great
This is a good vid cause I’m school I’m learning about light and waves
Teacher: we cant see the speed of light because its tooo fast for our eyes
Them:
Them: Hold my beer
RT has discovered the concept of relativity.
Too fast for eyes but not for that camera
Мы не можем видеть полёт пули! Однако видим при замедленном воспроизведении
Gav: “no human should have seen this.”
4.8 million people see it
Thanks the likes btw :)
Raythenoodle 1 can you send me a time frame because i can barely even find it, is it even in the video?
@@cheeseboi6357 0:22
So what I said the same thing when my nudes leaked except 1.8 is a little low.
@@Scorpia__ Give us a link
@@xero2715 dude...
so interestingly that the most view part of this explanation video is not about mr. Wang talking about how camera works at 2:26 but the demonstration part at 6:55. Good job to the team that people only undertand after you guys show an example :)
Muy bueno el video...!! Impresionante. Gracias..!! Saludos desde las sierras de Córdoba Argentina...!!! 👍👌💪🇦🇷
“State of the art laser pointer”
*EVERY CAT WANTS TO KNOW YOUR LOCATION*
even my cat? 🙀
ItzCr3eper and mine 😺
Miaw 😻😻😻
😸😸😸😸😸😸😸😸😸😸😸😸😸😸😸😸🙀🙀🙀🙀🙀🙀🙀😼🙀🐱🐈🐈😸😹😸😸🙀🙀🙀🙀🐱🐱🐱🐱😻😻😻😻😻😻😻😻😺😹😹😸😸🐈🐈🐱🐈😹😹😻😺😹🙀 x2000
🐕 I like these better...
Producer: "How long are you guys going to go with this joke?"
8:10
Well only one blink
he sounded so irritated
Shut up producer, I'm enjoying this.
i wish i could go on aincrad
Well its TH-cam wdy expect?
My favorite channel!
Have you watched these guys at 0.25 playback speed yet? I wonder if they'll get paid more by TH-cam if we watch in slowmo. LoL
Amazing! .. the closest to light path I've been was with a Light Field Camera (lytro illum) and it stuns just realising the light beams projections in a volume/field with depth and no focus need (can do it anytime later).. but this.. got me speechless!
Somebody should do the double slit experiment using that camera
definetly, I hope they read it and send it to them.
I don't think it would matter, as the camera is still "viewing" the photons, which is part of the anomaly. The speed of the camera wouldn't explain why the photons react differently to being watched.
I Think they did, if you look More videos of the femtosecond camera, you can see some weird stuff about how they see things behind a wall.
The double slit experiment not, but some sort of that.
I remember, is how a beam of light spread on an apple, and they visualice some wave behavior by quantum effect in the shadow.
The double slit experiment relies on firing individual photons, which this camera couldn't detect, as capturing the image required having some way to scatter the laser beam's multiple photons into the camera (the milk or a lens, for example.)
Now that I say that, I suppose you may be able to fire the photons directly at the camera's detector, but that would only be able to tell us when they arrived, not how they traveled, since you'd need a view from the side for that. As we're already firing individual photons, time of arrival would be useless information.
EDIT: This is also assuming the camera has the resolution required to resolve individual photons, which I doubt it does given the video quality shown.
@@chikitronrx0 sounds awesome, where did you find those videos?
just mind boggling. I appreciate the existence of this youtube channel.
All of a sudden this is in everyone's recommendation
oh well, thought I can send it to my physics teacher.
I don't understand alot of this but I do love the science and technology involved
आपके वीडियो देखकर अब और भी ज्यादा मज़ा आता है ।।
Love from India...
i wanted the foot cover tech
That cat lived in turkey and died a few years ago sorry for your lost you can drink rakı for it it used to loved it RIP Tekirdagian cat
Thanks for sharing this information 🥰🥰🥰🥰
Oh! I know about LiDAR from historic preservation surveying to see through foliage and stuff, but I’ve never actually seen it brought up in anything else! I’m not a big physics person, so I guess a lot of the technology behind it and other possible uses I forgot about. That’s really cool!
Very impressive technology, it's amazing to see how light actually travels and the path it takes
Now something to watch during this quarantine period.
Incredible!
This makes me wonder, there are several videos on TH-cam stating that it is impossible to measure the speed of light in one direction, but would this process allow that measurement to be made since we are capturing the lateral movement of light in a single direction - question for Veritasium and others...
Interesting question! From what we know of relativity though the answer is no, the main constraint to measuring light in a particular direction isn't a fast enough camera it's that the time elapsed in a particular direction is contingent on the relative velocities between the observer and phenomenon when the observation is being made. For a visual example of this check out en.wikipedia.org/wiki/Time_dilation#Time_dilation_caused_by_a_relative_velocity
You can see on the left when the observer is at rest we get a certain time and distance elapsed but when the observer is in some relative motion to the event being the time elapsed is increased. Even though for the light's purposes it's still moving the same vertical path it was going through before, for the observer the light is now moving through a longer, diagonal distance over a longer time.
The answer to measuring the speed of light one way is far simpler than we need relativity for, even if it is a factor. The signal to the receiver goes at the same speed (or slower with electronic component interfacing or computer language translation) as the light we're trying to measure between two points. Mind we're only trying to record the difference in time, not a picture of it as was done in the videos here. The light gets to the receiver before or at the same exact time as the trigger signal saying "start recording the time now." The time recorded by the target device in this scenario is always zero or negative. A negative result only tells you how delayed your data is, not the speed of either the light or the transmission.
There is no workaround to this without quantum tunneling of some sort linking the emitter and receiver into an instant connection that defies proven and useful physics on any scale above subatomic. The only way to directly record the speed of light is with a reflection back to the source device, (which started its own timer,) then divide that time by the round-trip distance.
That being said, we can (humanity can...I certainly can't myself) reasonably record said speed from the side as was done here, with devices that are independent from the light's source or target, and a helper medium to make the light visible from the side. That measurement, however, is fallible due to perspective and distance. In the bottle demonstration, light is also refracted by the bottle's shape. (And why couldn't they remove the label!?)
This is kind of a good-quality middle point between accurately measuring the speed of light, and measuring the speed of data like the common demonstration of waving a laser across the sky. (In the sky, one side of the arcing motion is billions of light-years away from the other, but you haven't made the light move that fast, nor perceived at that speed.)
All this is not to say the video is inaccurate or not really amazing. It's just measuring the speed of light in our perspective, not the direct rate of travel. The speed of playback also completely changes the apparent amount of time, but that's down to trust in the technology and presenter.
hello, yoctoseconds are used for the lifespan of the bosons. W and Z bosons live for 0.3 ys, and the Higgs Boson lives for 156 ys
Level1: Filming Dan get hurt in slow mo
Level100: Filming light in slow mo
That's how mafia works
(Sorry for the dead meme)
How about filming Dan getting shot by a laser in slow-mo?
Level 1000, film light getting hurt in slow mo?
Level undefined: filming light getting hurt
Its Zain Dead meme
No cap, I was thinking of this before I got to sleep, after I woke up I find this in my recommendation
Great program
What a great follow-up. Definitely added so much need context to the original.
Yeah, out of all the follow ups, i found this episode to be the best.
Ok, this was mind-blowingly interesting. I believe this is actually my favorite video from you guys. The implications of this! Just... just wow.
amazing mind blowing information👍👍👍
Really curious how the triggering device works. Like how do you make a pulse for such a short length of time
That's the beginning of what I wanted in this video. Demonstrating the time scale is fine, but I got that already even if I don't know the factors offhand. The lenses were interesting, but...I really want to know how the camera takes that many frames per second. I suppose it's a similar signalling system between the camera and laser, for both to be so short and precise.
*Is this camera capable of filming the speed of light?*
Just a simple "yeah".
*OOOOOOOHHHHHHHHHHHH!!!*
Lol
You know, if there was way to combine:
1. The electron microscope that lets you see atoms,
2. This camera that lets you see down to the speed of light and
3. The Large Hadron Collider.
You would be able to see atoms break down into their elementary particles.
I don’t fully understand the science behind all these devices but if the first two could be combined together somehow and placed in the Large Hadron Collider, that would be really awesome!
The somehow and "placing it" inside a particle accelerator are the challenges.
I don’t fully understand how we are able to see certain stars and galaxies from here on earth with our eyes…yet impossible to ever physically get anywhere near them🤔 Space time is so different then anything most people can truly comprehend . The time the universe evolved compared to time we as humans have spent on this planet is almost confusing…We still haven’t explored 100% of Earth…And to think a few HUNDRED years ago people were using animals for transportation while the only available light after the sun went down was the moon and stars in the sky…unless a fire was involved. 🫤
@@MaRkYWaHoO
"I don’t fully understand how we are able to see certain stars and galaxies from here on earth with our eyes…yet impossible to ever physically get anywhere near them"
We are small, but the galaxies are far away. Small... Far away...
Seeing our brain sending electronic signals in a slow and understandable speed is absolutely freaking bonkers. This could open up a terrifying amount of doors in science! In multiple fields to. Imagine watching light be absorbed and turned to chlorophyll in thirty seconds with this clarity. What if you hooked this camera up to a particle accelerator?
When you realized that at some point in your live you're just 1 yoctosecond old
Gav: we are in the presence of some of the most revolutionary technology on the planet
Dan: Kan u reed mih mynd
Lol
U SOUND TRINI/JAMAICAN🇯🇲🇯🇲🇹🇹🇹🇹
If you can film at 200 000fps, it means light can travel 1500 meters in one frame...
If you set up 2 mirrors at 750m and 1500m and shine at them, you should be able to see difference :)
Hey Dan take a quick second to put the arm in the sleeve. It's okay if it's ripped just use it. You guys are awesome thanks for the Light Show..!!!
I'd like to see the double-slit experiment on this time scale.
Everyone in the world should watch this, its incredible amazing to have seen this.
It's great how you use your TH-cam platform to do interesting things and educate many like me.
I know you like doing this and it gives a lot of money but still making informational videos helps the intriguing students to learn a lot.
So thanks Buddies 👍
Having an interest in radio and electronics from an early age, I suggested once, that if we could see Radio Frequency/ Electromagnetic waves, that we likely could not see our hand in front of our face, because of all the various RF devices, which have only grown in number, since I first thought of this.
Now seeing this, I have to wonder if a little tweaking may get us to that point ?
Mind blowing !
It's amazing
For perspective about light speed.
At the speed of light you would travel Around the Earth almost 8 times, within a second.
It takes roughly 60-70 hours for us to do it once. (about 252000 seconds)
It takes about 7-10 minutes for light to travel from the Sun to Earth.
Mars from Earth takes anywhere between 8-20 minutes, because of orbit variation.
Closest star to our is Alpha Centauri, it takes over 4 years for Light to travel, it would take us over 100 years, if we get from 0 to +13,000 khm.
In another words your grandchildren would enjoy Alpha Centauri before you would get there.
Light is fast. Bit too fast to truly comprehend for us, but try to imagine all of this.
Keep in mind, all of these are rough estimates not 100% facts, but do the research, its impressive.
What is crazy as well is that all of that is refering to the speed of light in a vacuum. The light we saw in the video, isn't quite as fast as the speed you mentioned but, it is still on the same scale. If light is traveling through a medium, it is possible for objects with mass to travel fast than the speed of light, creating a "optical boom" (this is called Cherenkov radiation".
Light is fast and we can hardly comprehend it, but then think about the distances it takes to make light have a 4 year commute. Then you go up in scale and realize the milky way is thought to be just over 100,000 light years in diameter which means it would take light 100,000 years to go from one side to the other. How long would a video of light traveling across the galaxy shot at 10 trillion frames per second be?
eightfreak888 my mind cant comprehend the fact that even for light if would take 100k years to go from one side of our galaxy to the other . im trying to wrap my head around how big our galaxy is .... & its just one out of many galaxys in a even bigger universe that holds them all ... my God ....
to make your numbers more precise:
travel around earth:
boeing 747: 570 mph, 43h 41m
concorde: 1341 mph, 18h 34m
sr-71: 2455 mph, 10h 8m
ISS: ~17000mph, ~ 1h 30m
sun to earth light travel time: ~ 8m 19s
Yes you've answered my wonders of how light moves and how long it would take to get from point a to point b.love interesting videos like this .
What’s fascinating about the Femto second lasers is they are SO fast that when a material is cut by the laser it leaves NO heat affect zone as if it had been cut cold! MIND BLOWN
Dup
Neverending Story 2, there was a line in there saying the speed of darkness is twice the speed of light. obviously used as literary flavor text to describe how fast the villainous armies were, but fun to think about
Perspective: Say the footage at 3:30 was filmed at 1 frame per picosecond (1 trillion frames per second). It took the laser roughly 1900 picoseconds to move across the water bottle. If you were to watch a full seconds worth of real time video filmed at that speed at 24fps, it would take roughly 2.5 million years to finish the clip. (At 1fps it would take roughly 60,200,000 years to watch)
Wow. That's terribly
Guys this was actually better then the actual filming of the speed of light...
I love it.
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I want to go 30 years back with this film
هاي غاي
عبدالله عبيدات ؟؟؟؟؟!!!!!
Lol
These extreme time scales are useful. For example decay of some particles via strong interaction is in order of 10^{-22} seconds...
LOVE YOU GUYS
9:37 gives a new meaning to "in the blink of an eye", "just blink and it's gone/happened"
Dan's eyebrows:I'm fast AF boi
Speed of light: hold my beer
Slow Mo guys meeting the Slowest Mo guy 🤝
Mind-blowing
Now imagine that slow but as close as possible with super good resolution and watch the lighting then!