Prefer to read? Here is my article about lasers: medium.com/@Higgsino/the-surprisingly-simple-physics-of-a-laser-47d7d23e928e Physics Teacher would probably be mad I didn't cover Laser Resonator Modes and the nice property of using 4 level atoms. But nevertheless I hope you learned something new :) - Special thanks to "Pretty Much Physics", "Zap Physics", "Ancient Accounts" and "everything science" for correcting this video. - Thank you to the nice folks over at p5py for making an amazing python animation package. - Thank you to the wonderful patreons
@muhammadshaban93683 жыл бұрын
why laser use pump source flash light why not use countine light please tell me.
@KendnanGalvãoMacêdo11 ай бұрын
bote um espelho um de frente para do outro o vc um lunpin infinito da mesma imagem como vcs chamam de viagem no tempo
@KendnanGalvãoMacêdo11 ай бұрын
no espelho 🪞 tempo anda Patras o movimento pra frente
@AncientAccounts4 жыл бұрын
"most important tool for teasing cats" lmao
@zapphysics4 жыл бұрын
I can't get over how great the animation at 10:50 is. Excellent job showing this in action! Great job, man!
@ParthGChannel4 жыл бұрын
Ahh so clear, so crisp. Loving it my dude!
@noelomaolchraoibhe39113 ай бұрын
FWIW, you are the first subject matter expert I have found that was able to explain stimulated emission in a way that made it comprehensible! I have watched many videos that purported to explain the phenomenon and all failed to get it across to me. Your script & visuals are just right.
@companyjoeАй бұрын
Thank you! I did have to pause and rewind constantly but after all this video explained lasers better than any other video I've seen.
@Higgsinophysics10 күн бұрын
glad you liked it! Thanks
@rajiv8k4 жыл бұрын
Thanks, If only I had these resources when I was a kid... Our teachers never explained it to us like this.
@minerscale4 жыл бұрын
What an awesome video! Beautiful looking, clear and consice, incredibly educational. Thanks for making top quality videos!
@xavierlebeuf30614 жыл бұрын
I've always wondered how laser worked. And you explained it very well, thank you!
@alfredfeldt56944 жыл бұрын
cool, random guy on the internet tells me what my physics teacher could not
@PrettyMuchPhysics4 жыл бұрын
Great animations, as always!
@quahntasy4 жыл бұрын
*Such an amazing simulation. I loved it.*
@2false6374 жыл бұрын
I learnt something cool today thanks to you! Great content.
@adonaythegreat84264 жыл бұрын
Easy to understand.
@aaron223729 ай бұрын
Thank you for an informative video! I don't fully understand why the light coming out of a laser is coherent. "Stimulated emission" explains why an initial photon bouncing back-and-forth can accumulate a large number of coherent photons. But it seems like there would be countless "initial photons" all over the cavity, each accumulating their own, independent collections of photons. Why would the phase of any one group match other groups?
@marcovillalobos51774 жыл бұрын
YOU ARE AWESOMEEE
@ferguscooper22664 жыл бұрын
That was a great video!
@NoOne-mx4nx2 жыл бұрын
Thank you Sebastian Vettel for this amazing video.
@Chandlerd179 ай бұрын
Nice but it seems like everyones explanation is a bit ambiguous around the pot so to speak and very simplistic,i would like to know the math and energy it takes to operate a laser and its output energy and its losses.this information seems very obscure because there is no video about it,not even MIT.what’s up with that?i would love to hear a clear explanation of the mathematical working principles.
@atticuswalker7 ай бұрын
is this just a theory or the best sudgestion to date. there seems to be alot of conclusions based on what could be happening. or . the wavelength of light that enters the glass passes through to a space where the ruby crystal has a different effect on light than any other transparent mass. being red. so when the uv tries to get out the other side as a different wavelength. it can't.
@BorisNVM3 ай бұрын
cool
@joeyysossa41443 жыл бұрын
I took apart a simple laser pointer when I put it back together it didnt work anymore...what went wrong???
@ARCSTREAMS3 жыл бұрын
you are saying that an electron will absorb a red photon and will emit a red photon? that makes no sense ,from what i know the photon emitted by spontaneous emission will have a longer or weaker wavelength than that of the photon that created it ,this is why for example an 808nm photon will excite yag crystal to emit 1064nm photon, the 1064nm can stimulate other electrons already in the exited state to emit another 1064 photon but if 1064 hits an electron in ground state it will be either absorbed or passed as heat otherwise why not use 1064 diode to excite the yag instead of 808 diode?
@ItsMe-rp6rf2 жыл бұрын
Hey ..plz tell me the background music... 10:15 to end
@vinniepeterss5 ай бұрын
❤❤
@8dgrooves3342 жыл бұрын
Hey dude, I gotta say...This video is AWESOME ! ! ! can you please add subtitles?
@nupurbagwe1342 Жыл бұрын
you explained everything in less than 13 mins whereas my professor wasn't able to do in 4 lectures 🙂
@KhagisaraPathak Жыл бұрын
My professor told us to read it by ourselves. Didn't even bother to give 1 lecture on the topic.
@KendnanGalvãoMacêdo11 ай бұрын
tente um teste com um espelho 🪞 leiser tente caucular velocidade muda trajetória da luz leiser
@marcovillalobos51773 жыл бұрын
Is the code in GitHub? It would be really interesting to play around with the animations, and to change things to see how the system reacts
@Higgsinophysics3 жыл бұрын
It's not available now... But i plan to make it (and other things) available in the future :)
@marcovillalobos51773 жыл бұрын
@@Higgsinophysics That's a shame, I've tried to make one of this myself but the stimulated emission part makes it really difficult to code
@pranitabaruah2662 жыл бұрын
Why when the optical cavity gets pumped by the optical pump only half of the atoms get excited? I mean yes, when half of the atoms are excited and optical pump lights up again then the already excited atoms undergo stimulated emission and get de-excited and the relaxed atoms get excited and so again only half of the atoms are excited each time and the cycle continues (this is true only if the atom has two energy levels). But, why only half of the atoms are excited in the first place? Why when the optical cavity is first blasted by light from the optical pump only half of the atoms are excited? Why don't all of them get excited in the first place?
@Higgsinophysics2 жыл бұрын
That's a brilliant question. Keep in mind this is just a simulation. But the real world is complicated. I could write many problems, but one big problem is, if you wanted all the atoms excited by one blast the intensity of the photons would be extreme!! And it is not possible to let photons arrive at exactly the same time, photons follow a Gaussian distribution. So if one atom gets excited by the very intensive blast, then a nanosecond after a slight delayed photon would de-excite it. Or the blast could be so powerful it excites other electrons in the atom or ionize the atom
@pranitabaruah2662 жыл бұрын
Oh My God! You actually replied! I am your big fan Higgsino Physics! I LOVE all of your videos and your laser video, in my opinion, is the only video on KZbin that actually explains how it works easily because of the animations. Your animations are phenomenal and they make understanding physics so easy! Your video in which you used dominos to explain sound propagation blew my mind! Your videos have been so helpful to me in Physics. Higgsino Physics, I actually don't have good physics teachers or any people to whom I can ask my physics doubts and so I have to self-study physics and I have an entire document full of doubts in physics. Could you please help me in physics by some means (for e.g. so that I can easily ask you various physics questions if I have doubts in them)? It would mean the world to me if you could help. THANK YOU SO MUCH!
@Higgsinophysics2 жыл бұрын
Glad to hear you like and learn from my videos! Thanks man. I think you could get much better and faster answers on physics.stackexchange.com/ :)
@pranitabaruah2662 жыл бұрын
I know this might be a stretch but is there any way through which I can contact you Higgsino Physics for asking nothing other than the doubts I have in physics?
@pranitabaruah2662 жыл бұрын
kzbin.info/www/bejne/op6Wc61ohMpqirM The above video is my attempt to explain why is the sky blue in colour. I know it isn't good. I just want to share it with you Higgsino Physics.
@muhammadshaban93683 жыл бұрын
why laser use pump sorce flash light why not use countinue light
@KendnanGalvãoMacêdo11 ай бұрын
pense no tempo como moeda joge para sina agora tentar prever cair 😮 ou coroa 👑 tanto faz o resultado tanto faz tempo os dois estão sertos um tempo no tempo cai 😮 ou 👑
@kayrstar89654 жыл бұрын
A comment
@turbochicken803 жыл бұрын
Are your videos trustworthy?
@excellentmike9 ай бұрын
I recommend you don't go into teaching. I found it very hard to follow compared to other videos on the same subject.