@@mccauleymccranie3752 I'm no astrophysicist but I know that light almost entirely lacks weight so i doubt it would be dragged along like some tokyo drift light beam if you shot it out sideways.... I'd entirely guess that some weird time physics would happen for an instant to correct the "way of things" and that light would continue on it's way as if nothing is going on. ..but again that's just a guess and i'm no physicist.
Leslie Asher You didn’t know, but Schrödinger asked Einstein to look after his cat for several days. Einstein needed to somehow entertain the cat and he had the idea - a laser!
@John Connolly He was saying the editor is doing such a wonderful job that they should give him more money as a reward. Usually the "x needs a raise!" comments are used to express how invaluable that person is to an operation. No worries! 😆😝😜
because no one wants to work for cheap, take their jobs home with them w/o pay and babysit children who weren't raised right and have no respect for teachers.
I wish I could attach an image. My brother created the first Residential Laser Installation in an Abstract Art Collector's home in Dallas, TX USA - back in the mid-nineteen-eighties - using two types - Argon, & Radon Gas devices. It had to be certified both by the FAA & FDA. The setup included air-directed smoke devices, and was primarily used for entertainment - not so much for the art - which was highlight by specialized Halcyon & LED Lighting - whose technologies continue to advance yearly.
How about using lasers for measuring distances. Some are great for micro measurements and others are great for measuring long distances such as range finders for military applications. Robots are using them for detecting the presence/absence of objects so they will not impact them (automated guided vehicles in manufacturing). They are used for setting up walls of detection with programmed "windows" in the wall that will allow objects to pass through without triggering an alarm
One small but important detail not mentioned (sorry if I missed it) is in a LASER one of the two mirrors only reflects light to about the order of 99% so that some of it can actually escape. So the light you see coming out of it is only 1% (rough estimate) as bright as the light trapped inside the cavity. Also worth mentioning is that some super expensive LASERs can produce a single wavelength of light. LASERs and similar artificial light sources are the only that can do that. Natural light sources typically spawn a broad bandwidth of wavelengths. What this again means is, if we find a source of light in the sky that emitts only a very narrow band of light, it must be artificial! A LASER pointed at us bascially!
As a concentrated, highly focussed beam of energy, I was always impressed by how similar H. G. Wells' Martian heat ray was to a laser beam. Science written about in science fiction before the fact.
OK so I get the whole electron excitement, bouncing photons off a reflective wall intensifying it. But then it all escapes, right? Great explanation of how a laser works but you forgot the ending. How do the photons stay cohesive (for lack of better term) after escaping the reflective walls into the chaos of air ?(i.e. from cat toy). Asking for my cat.
AMAZING video! Educational AND entertaining! But am I mistaken or does Chuck's t-shirt say to end caffeine?!? Is that like secretly switching my regular coffee for decaf?
Talking about getting excited in the right environment; I wish my thing was listening. It keeps embarrassing me in the worst places possible. Like last time I had a very important presentation and I was nervous, then BAM, there it was up like a pole. At least it made the audience laugh which is a plus... I guess.
And on the third day Einstein said "Let there be laser", and there was a laser. And he saw that it was cool. And then he rested. And while he rested, he did all sorts of mental experiments.
This is interesting because my eye doctor took stitches out of my eye and used a red laser to close the rest of the open wound (the same wound that my eye doctor made for surgery). Seeing a laser beam like this was cool to see with my own eyes (it who was being shot by the beam).
At the beginning they said the electron returns back and emits the exact same energy as a photon.. How does the stimulation happens then? Whatever energy you inject the exact same must emmit
Because you are focusing the radiation in one 'direction'. It still has the same overall energy...but the wavelengths of light are now focused and in lock step with each other.
The emitted photon has slightly less energy than the incoming photon due to vibrational relaxation while in the excited state, so, it is a slightly different colour, might only be a few nm of a difference, but there is a difference.
Could you get Terrence Howard on here? It would be interesting to hear you debate 1X1=2, his theory that the universe is a spiral, and that gravity is an effect and not a force.
The word laser started as an acronym for "light amplification by stimulated emission of radiation". ... It has been humorously noted that the acronym LOSER, for "light oscillation by stimulated emission of radiation", would have been more correct. (wikipedia)
You mean to tell me that we have known about the concept of lasers for over a hundred years and we STILL don't have sharks with fricken laser beam attached to their heads?
I would love to hear more about how a laser going through a magnifying glass gets hotter (negative Kelvin temperature?) vs a flashlight and how thermodynamic conservation of energy and quantum mechanics play a part.
Neil, as a scientist, what have you learned from Chuck, as a comedian? He seems to have some odd insights. You should give him a "credit" episode. Btw. Love you platonicly. Lol. You changed my life.
i wanna know how "movie lasers" could exist...like, take Star Wars for example-- whether its a Blaster Rifle or a Starship's main cannons, they fire a "bolt" of light...it goes much slower than Actual light (since you can actually see the trajectory of this projectile) but they can be "held" by the Force...whereas, in Real Life, if you were to 'fire a laser' at something, youd see the Straight Line of the laser, from source to target, for the Instant that it takes that light to travel... ...but HOW could the Sci-Fi "Bolt of Light" idea work? or, could it at all?
I live off the grid I am using an old servel gas refrigerator I would like to know if it is feasible complete the element with a laser how durable how long they can last because I see these hundred-dollar lasers that are supposed to be hot enough to etch steel glass and blow solder that should be hot enough make my refrigerator work headed for laser lasts more than 2 months it's cheaper than propane just curious maybe you'll see this I'd like to know what you think
Lasers are awesome! Never stop talking about lasers! No more explainer 15min talks, take a whole #StarTalk episode (or two…maybe three) and DeepDive into how lasers are made, work, and are useful! After all, lasers were used to initiate fusion not long ago using something like over a hundred of the most powerful lasers EVER to demonstrate Inertial Confinement…take one of them…(the size of a big a** building, and fit it into a gun-sized thing….ba-da-bing!!!! STAR WARS LASER GUN. Also free energy for the next few millenia of hopeful AF human civilization.
@@ME-ru4hv Science has determined photons are a thing. Your lack of understanding is your problem. "The photon is a type of elementary particle. It is the quantum of the electromagnetic field including electromagnetic radiation such as light and radio waves, and the force carrier for the electromagnetic force (even when static via virtual particles). The invariant mass of the photon is zero; it always moves at the speed of light in a vacuum."
I love how theoretical physicists can just figure something out, not have any idea what it could be used for, file it away as a curiosity, and then decades later somebody uses it to make a revolutionary break through.
@@BlackEpyon That's because you can't think broadly enough to imagine theoretical physics. It was used to create the first nuclear weapons. Computers (the one you are using ) were a theory at one time as were many other inventions. It's a good thing everyone isn't as small minded as you.
Wait a minute... My retina is 2 to 3 times more sensitive to green light, as opposed to red light? I will have to remember that, the next time I'm in traffic court. Thanks Neal.
A few more you may not have known. TASER Thomas A Swift Electric Rifle RADAR RAdio Detection And Ranging SCUBA Self Contained Underwater Breathing Apparatus
@@nathanielb9016 i dont think we'll ever invent teleportation, to turn you whole body into pure energy then reorganize you back together without complications would take an enormous amount of power
@@jordanholliday9163 If you have the ability to even do teleportation, i doubt the problem will be power. More like the actual logistics of reorganizing people.
These are just applications of some "weird", "theoretical" and "i wonder how we will ever use that" stuff. That's all thanks to the fact: THE SCIENCE OF TODAY IS THE TECHNOLOGY OF TOMORROW.
The moments when Chuck gets super excited about science warms my heart. Scientists and science enthusiasts are like kids in candy stores and we love it.
Wait, when he explained it initially he said the [random] atom's electron absorbs the photon causing it to excite (elevate) momentarily, then it calms back down (deescalate), which then causes the electron to re-release the photon. This is 1 photon that gets absorbed momentarily and then released. But then all of a sudden they're showing 2 photons are released for every 1 photon that's absorbed? How does this not break the conservation of energy? And where does the 2nd photon come from? If it's converted energy from the atom, wouldn't the atom degrade over time?
Also if electrons were to orbit the nucleus as Neil described that too would break the laws of conservation of energy. Bohr's model of the atom was replaced by Schrodinger's quantum mechanical model of the atom.
@@dankdreamz I was thinking about that too as I was watching the demo. But I just figured if you were blasting an atom with protons you were bound to hit electrons regardless.. it's just that I watched an explanation of how lasers work meant for children to understand, but I know less than ever now mixed with misinformation
I work on high power lasers for a living and they missed some majorly important key facts... The whole process starts by adding in "pump" energy - an electrical pulse that brings the "gain medium" (ie the atoms) up to the excited state. A few of these naturally decay to a low energy state and in the process release photons in a random direction. The "resonator cavity" optics then reflect back photons that are heading in the "right direction", which creates that back and forth snowball effect where more and more photons are generated. Each photon generated by a photon knocking into a particle that was previously "pumped" by the initial electrical pulse will be emitted with the same wavelength, phase and direction as the photon that bumped it. If you remove the resonator optics all you get is a bright glow in random directions and no "laser". Btw pretty much every electronic device (CPU, RAM, processor, integrated circuit, etc) is made using lasers to project the pattern of the chip onto the silicon substrate. The process is called DUV lithography. Kind of shocked he left this out since electronics are easily the biggest change to humanity that has come from lasers...
@@sooocheesy I hope you monitor this comment. I have a question. If you shine a laser at a curved mirror, could you bounce that laser back to another curved mirror that would cause the laser to bounce back and forth forever?
Phdintheory there is a way for you to bounce a photon back and fourth; however, it’s not forever. Each time it’s reflected a little tiny bit of the photon gets absorbed by the mirror. You can actually test this. Have you ever seen 2 mirrors facing each other? That’s literally what you’re describing where the light keeps being reflected back and fourth. When 2 mirrors face each other I think people call it an “infinite mirror” and if u look at it, each time it reflects the image gets a bit darker meaning photons are being either lost or absorbed. (The mirror also gets a bit greener each time it’s reflected meaning mirrors are actually green)
What have you used lasers for?
cut my lawn. (The city put a stop to that.....real quick)
Playing Minecraft wit da bois
StarTalk cutting a hole through the wall so I don’t have to open the door
To signal other friendly convos in Iraq
@@mccauleymccranie3752 I'm no astrophysicist but I know that light almost entirely lacks weight so i doubt it would be dragged along like some tokyo drift light beam if you shot it out sideways.... I'd entirely guess that some weird time physics would happen for an instant to correct the "way of things" and that light would continue on it's way as if nothing is going on. ..but again that's just a guess and i'm no physicist.
the zoom editing is everything in this video, A+
😎
It was hilarious!
😷
I think Einstein would have enjoyed lasers being used to entertain cats.
Leslie Asher You didn’t know, but Schrödinger asked Einstein to look after his cat for several days. Einstein needed to somehow entertain the cat and he had the idea - a laser!
@@romangerasimov5183 In the process of laser testing, Schrodinger's cat became just a regular dead cat.
@@youwillnotknowme *Slowly puts cat back in box*
Thats on those occasions when he hing out with Schrödinger.
@@0079Matthew and that's how Einstein solved the uncertainty principal , he knew the cat was dead .
YOUR EDITOR NEEDS A RAISE
:)
Clearly it's the editor who replies to TH-cam comments, haha!
Not that I disagree... Awesome work!
Yeah it's very good editing. It makes it easier to understand for a layman like myself.
The James bond bit made my day 🤣🤣
@John Connolly He was saying the editor is doing such a wonderful job that they should give him more money as a reward. Usually the "x needs a raise!" comments are used to express how invaluable that person is to an operation.
No worries! 😆😝😜
Einstein was an absolute BOSS. I wish we had just a few more decades of his brain.
i bet he wasn't appreciated when he was young until people started to realize his brilliance.
@Derrick campbell Yeah, I thought I also heard it was in the trunk of a car for a really long time too. lol
@@J040PL7 I don't think he was. He was criticized and told he'd never be anything iirc. I think he flunked math as well. ;p
@@J040PL7 I bet the people who knew him appreciated his brilliance
@@Jay-Kaizo that's just 1 teacher. I bet most geniuses had that one person who tells them they are not as intelligent as they think.
Why we can't have teachers like him in our school
because no one wants to work for cheap, take their jobs home with them w/o pay and babysit children who weren't raised right and have no respect for teachers.
Joe wut
He is the Michael Jordan of explaining science. And he is just a rare.
We can't afford the school fee then
We do
I swear...I feel smarter every time I listen to Mr. Tyson. I learn so much. Plus, the banter these two have between them is is so funny
You guys rock!! I learn so much, every time!!! Thank you for your knowledge!!!
Thanks for watching!
Fun Fact, Einstein wrote the first paper on the LASER. Should've win a Nobel Prize for it. Super genius.
This was one of their more goofy humor yet informative clips, love it! 🥰
I wish I could attach an image. My brother created the first Residential Laser Installation in an Abstract Art Collector's home in Dallas, TX USA - back in the mid-nineteen-eighties - using two types - Argon, & Radon Gas devices. It had to be certified both by the FAA & FDA. The setup included air-directed smoke devices, and was primarily used for entertainment - not so much for the art - which was highlight by specialized Halcyon & LED Lighting - whose technologies continue to advance yearly.
6:09 i freaking jumped out of my seat xD
I think Neil nearly did too lol
5:28 that sneak diss from Neil lol
Neil straight up jumped when chuck screamed about the laser on his stomach. Had me dieing. Lol
How about using lasers for measuring distances. Some are great for micro measurements and others are great for measuring long distances such as range finders for military applications. Robots are using them for detecting the presence/absence of objects so they will not impact them (automated guided vehicles in manufacturing). They are used for setting up walls of detection with programmed "windows" in the wall that will allow objects to pass through without triggering an alarm
I love how father and Son are on these videos, makes it so heart warming they do this channel together.
I haven't known that science is this much fun! 😃every class should have a teacher like him and a student like my boi!
One small but important detail not mentioned (sorry if I missed it) is in a LASER one of the two mirrors only reflects light to about the order of 99% so that some of it can actually escape. So the light you see coming out of it is only 1% (rough estimate) as bright as the light trapped inside the cavity. Also worth mentioning is that some super expensive LASERs can produce a single wavelength of light. LASERs and similar artificial light sources are the only that can do that. Natural light sources typically spawn a broad bandwidth of wavelengths. What this again means is, if we find a source of light in the sky that emitts only a very narrow band of light, it must be artificial! A LASER pointed at us bascially!
I like these short clips of certain subjects make more startalk ⭐️
We've got more coming! Stay tuned.
As a concentrated, highly focussed beam of energy, I was always impressed by how similar H. G. Wells' Martian heat ray was to a laser beam. Science written about in science fiction before the fact.
OK so I get the whole electron excitement, bouncing photons off a reflective wall intensifying it. But then it all escapes, right? Great explanation of how a laser works but you forgot the ending. How do the photons stay cohesive (for lack of better term) after escaping the reflective walls into the chaos of air ?(i.e. from cat toy). Asking for my cat.
Beginning to understand Tyson’s brilliance
AMAZING video! Educational AND entertaining! But am I mistaken or does Chuck's t-shirt say to end caffeine?!? Is that like secretly switching my regular coffee for decaf?
Talking about getting excited in the right environment; I wish my thing was listening. It keeps embarrassing me in the worst places possible. Like last time I had a very important presentation and I was nervous, then BAM, there it was up like a pole. At least it made the audience laugh which is a plus... I guess.
Love the editing in this episode!
No mention of CDs/DVDs? I know that we're not using them much now, but still information storage is a great application for lasers.
What I find amazing is its 2020 and a COMEDIAN understands science. He gets it. Crazy how things change over time.
And on the third day Einstein said "Let there be laser", and there was a laser. And he saw that it was cool. And then he rested. And while he rested, he did all sorts of mental experiments.
This is interesting because my eye doctor took stitches out of my eye and used a red laser to close the rest of the open wound (the same wound that my eye doctor made for surgery). Seeing a laser beam like this was cool to see with my own eyes (it who was being shot by the beam).
Man, these two make learning fun!!
love these two
At the beginning they said the electron returns back and emits the exact same energy as a photon.. How does the stimulation happens then? Whatever energy you inject the exact same must emmit
Because you are focusing the radiation in one 'direction'. It still has the same overall energy...but the wavelengths of light are now focused and in lock step with each other.
The emitted photon has slightly less energy than the incoming photon due to vibrational relaxation while in the excited state, so, it is a slightly different colour, might only be a few nm of a difference, but there is a difference.
As always, great duo !
Could you get Terrence Howard on here? It would be interesting to hear you debate 1X1=2, his theory that the universe is a spiral, and that gravity is an effect and not a force.
Neil is such a cool guy!
We already have the tech to
attach lasers to our eyes lol
That 'meme level' sigh by Dr. Tyson....epic! 😎🤘
The word laser started as an acronym for "light amplification by stimulated emission of radiation". ... It has been humorously noted that the acronym LOSER, for "light oscillation by stimulated emission of radiation", would have been more correct. (wikipedia)
You mean to tell me that we have known about the concept of lasers for over a hundred years and we STILL don't have sharks with fricken laser beam attached to their heads?
You guys are A.M.A.Z.I.N.G. (Chuck, I know why you’re on the show: you’re just hilarious 😂) Keep going! ✨All the love!✨
Never thought science explanations could awkward… bet he’s Joey’s disciple.. Jams full of jellooooo
Hey Neil. Trivia: The world's most powerful laser is in Romania and they did an experiment to simulate a Supernova. It fired at 10 petawatts. )
oof im not first
but just as cool as someone who did. :D
@@CooKiesHouseCannabisCo
:'D
Very good program
Lightsaber when? I want a kitchen knife that goes "woosh".
Interesting. Always learn something new from this show .
Congrats... I love this guys...
I thought I remember reading about a 3d glass cube hard drive that is read by lasers. That was a few years back.
Albert Einstein paved the way for Laser Cats!!!!
I'm only commenting to say the ad worked. I am now downloading storyblock kekekeke
My Uncle helped design the barcode reader for Nat'l semiconductor or some such corp.
I would love to hear more about how a laser going through a magnifying glass gets hotter (negative Kelvin temperature?) vs a flashlight and how thermodynamic conservation of energy and quantum mechanics play a part.
Great editing in these
where does the energy come into the system for multiplying the photons?
mind blown again... thanks!
Neil, as a scientist, what have you learned from Chuck, as a comedian? He seems to have some odd insights. You should give him a "credit" episode.
Btw. Love you platonicly. Lol. You changed my life.
Can we get a description of how the rust removing laser works?
3D QR-code? I believe that's what Star Wars fans know as a holocron ;)
Very Special Cavity is my new band's name
Love this channal ❤️❤️❤️❤️❤️❤️
The amount of puns in this video😆
anybody else wanted to find out "Who had alot of Lasers?" 5:00
I wonder if during the 2020 lockdowns when startalk was all done remotely, did Neil miss grabbing chucks arm whenever he had an epiphany?
Imagine the discoveries if someone of Einstein’s level or Einstein himself were alive right now...
How's this for real 😲 I actually tried to lean out of the way 🤣😂
God said, i need a flash drive.... uhhhh Einstein. Now i need an OS.. Ayyyy Nik wassuup.
Neil, among the many applications for lasers, you failed to mention Holography!
Epic!
Funny song about Neil. Search TH-cam for "Neil deGrasse Tyson Song, Craig Einhorn". Look for guitar player with a maroon background.
At first I thought that was the GZA
3:12
spooky
i wanna know how "movie lasers" could exist...like, take Star Wars for example-- whether its a Blaster Rifle or a Starship's main cannons, they fire a "bolt" of light...it goes much slower than Actual light (since you can actually see the trajectory of this projectile) but they can be "held" by the Force...whereas, in Real Life, if you were to 'fire a laser' at something, youd see the Straight Line of the laser, from source to target, for the Instant that it takes that light to travel...
...but HOW could the Sci-Fi "Bolt of Light" idea work? or, could it at all?
Because technology has been around for thousands of yrs! Pics of UFO's being seen by people thousands of yrs ago
First item ever sold on eBay was a broken laser pointer.
DVD players, Blu-ray players, PS4, X-Box, etc.
I believe IBM used Lasers to store and read data from a 3D Cube a long time ago.
I was hoping he was going to explain why we see green better.
I live off the grid I am using an old servel gas refrigerator I would like to know if it is feasible complete the element with a laser how durable how long they can last because I see these hundred-dollar lasers that are supposed to be hot enough to etch steel glass and blow solder that should be hot enough make my refrigerator work headed for laser lasts more than 2 months it's cheaper than propane just curious maybe you'll see this I'd like to know what you think
so any hole is allowing things through from another realm we dont quite perceive, but now we know
If I send in 1 photon, and get 2 out, where did the 2nd photo come from? Seems to break some law of something.
Lasers are awesome! Never stop talking about lasers! No more explainer 15min talks, take a whole #StarTalk episode (or two…maybe three) and DeepDive into how lasers are made, work, and are useful! After all, lasers were used to initiate fusion not long ago using something like over a hundred of the most powerful lasers EVER to demonstrate Inertial Confinement…take one of them…(the size of a big a** building, and fit it into a gun-sized thing….ba-da-bing!!!! STAR WARS LASER GUN. Also free energy for the next few millenia of hopeful AF human civilization.
Einstein means in german "one stone" so he was really the one precious stone on earth
I would like a Bmovie with those two pal
"so there was no laser, and then he mathematically said hey check out this laser"
Witch masks me exited about wormholes !!!
@@ME-ru4hv The Laser was hypothesized using mathematics and theory.
And it works .
Photons are a thing.
@@ME-ru4hv Science has determined photons are a thing. Your lack of understanding is your problem.
"The photon is a type of elementary particle. It is the quantum of the electromagnetic field including electromagnetic radiation such as light and radio waves, and the force carrier for the electromagnetic force (even when static via virtual particles). The invariant mass of the photon is zero; it always moves at the speed of light in a vacuum."
I love how theoretical physicists can just figure something out, not have any idea what it could be used for, file it away as a curiosity, and then decades later somebody uses it to make a revolutionary break through.
@@BlackEpyon That's because you can't think broadly enough to imagine theoretical physics. It was used to create the first nuclear weapons. Computers (the one you are using ) were a theory at one time as were many other inventions. It's a good thing everyone isn't as small minded as you.
Wait a minute... My retina is 2 to 3 times more sensitive to green light, as opposed to red light? I will have to remember that, the next time I'm in traffic court.
Thanks Neal.
LOL
Lol😂😂
lmfao
Good one lol
Lmao nice
never knew "laser" was an acronym 😱 my mind is blown
A few more you may not have known.
TASER Thomas A Swift Electric Rifle
RADAR RAdio Detection And Ranging
SCUBA Self Contained Underwater Breathing Apparatus
David Stoler probably should of been LTASER Look Thomas a Swift Electric Rifle
@@5777Whatup that's clever and amazing 😄 thanks
GNU is not unix
@@Phil8sheo my mind is blown again 😱
Bro wtf is einstein. This man done discovered everything
Malik in the future he may be the reason we create teleportation
@@nathanielb9016 i dont think we'll ever invent teleportation, to turn you whole body into pure energy then reorganize you back together without complications would take an enormous amount of power
@@jordanholliday9163 If you have the ability to even do teleportation, i doubt the problem will be power. More like the actual logistics of reorganizing people.
@@leptinainccm Yep. Putting it all back together. Not just the hardware, but mostly the software. Meaning the human's personality.
These are just applications of some "weird", "theoretical" and "i wonder how we will ever use that" stuff.
That's all thanks to the fact:
THE SCIENCE OF TODAY IS THE TECHNOLOGY OF TOMORROW.
Oh great. Someone gave Chuck laser vision. There goes the neighborhood.
P.S. We're all trying to ignore you, Chuck.
At least it's a Nice laser
That thumbnail rocks
Neil deGrasse Tyson, you are the bedst for our world.
And I say that, in a small country like Denmark. Love you vidio's,. keep doing it!
The moments when Chuck gets super excited about science warms my heart. Scientists and science enthusiasts are like kids in candy stores and we love it.
3:45 when you and your friend finally figure out how to beat a level in a video game
I laughed so hard, perhaps harder than I should have xD Thanks for the quick trip back to the 90s.
4:15-4:19 Neil is so adorable! So pure, so cute😂❤️🔥
0:54 "wow wait a minute are you for real?"
*squeaky voice* "YEEEEEEEEES"
6:41 The real reason Luke was able to beat Vader in a lightsaber fight.
Neil, "So....." deGrasse Tyson
Wait, when he explained it initially he said the [random] atom's electron absorbs the photon causing it to excite (elevate) momentarily, then it calms back down (deescalate), which then causes the electron to re-release the photon. This is 1 photon that gets absorbed momentarily and then released. But then all of a sudden they're showing 2 photons are released for every 1 photon that's absorbed? How does this not break the conservation of energy? And where does the 2nd photon come from? If it's converted energy from the atom, wouldn't the atom degrade over time?
Also if electrons were to orbit the nucleus as Neil described that too would break the laws of conservation of energy. Bohr's model of the atom was replaced by Schrodinger's quantum mechanical model of the atom.
@@dankdreamz I was thinking about that too as I was watching the demo. But I just figured if you were blasting an atom with protons you were bound to hit electrons regardless.. it's just that I watched an explanation of how lasers work meant for children to understand, but I know less than ever now mixed with misinformation
I work on high power lasers for a living and they missed some majorly important key facts... The whole process starts by adding in "pump" energy - an electrical pulse that brings the "gain medium" (ie the atoms) up to the excited state. A few of these naturally decay to a low energy state and in the process release photons in a random direction. The "resonator cavity" optics then reflect back photons that are heading in the "right direction", which creates that back and forth snowball effect where more and more photons are generated. Each photon generated by a photon knocking into a particle that was previously "pumped" by the initial electrical pulse will be emitted with the same wavelength, phase and direction as the photon that bumped it. If you remove the resonator optics all you get is a bright glow in random directions and no "laser".
Btw pretty much every electronic device (CPU, RAM, processor, integrated circuit, etc) is made using lasers to project the pattern of the chip onto the silicon substrate. The process is called DUV lithography. Kind of shocked he left this out since electronics are easily the biggest change to humanity that has come from lasers...
@@sooocheesy I hope you monitor this comment. I have a question. If you shine a laser at a curved mirror, could you bounce that laser back to another curved mirror that would cause the laser to bounce back and forth forever?
Phdintheory there is a way for you to bounce a photon back and fourth; however, it’s not forever. Each time it’s reflected a little tiny bit of the photon gets absorbed by the mirror. You can actually test this. Have you ever seen 2 mirrors facing each other? That’s literally what you’re describing where the light keeps being reflected back and fourth. When 2 mirrors face each other I think people call it an “infinite mirror” and if u look at it, each time it reflects the image gets a bit darker meaning photons are being either lost or absorbed. (The mirror also gets a bit greener each time it’s reflected meaning mirrors are actually green)
The reaction we deserved. Chuck Nice is just me watching the video
4:14 Neil's little dance is lit af 🔥
You forgot the most important application of the laser: cats!
"that's kinda illegal... oh, but you... you know people" lol