Einstein in 1934: "There is not the slightest indication that atomic energy will ever be obtainable. It would mean that the atom would have to be shattered at will." 4 years later in Germany: Scientists split the atom at will/nuclear fission is discovered. Atomic energy obtainable.
Einstein was not an inventor. In no way did he know how LASER technology works, much less tell anyone how to build it. So give credit to the scientists/engineers who actually invented and pioneered this technology.
Indra Therion The history is interesting. Einstein did publish the theorie about “laser” light. The engineers told him that it is completely impossible to build. Over 40 years later a couple of engineers did not know that and after a couple of years managed to build the first laser. They introduced it to the world and sort of said: “We build it, know you have to find a use for it.”. 😂
This is the best explanation I've ever seen on the LASER, by far! The introduction is also one of the best explanations I've seen on atomic energy levels. Thank you!
A.I. is going to open the power of collected minds. Imagine Billions of minds connected via telecommunications to think and learn on subjects of interest and problems of consequence. All capable of transferring instantaneously.
I don't remember why or how I went on a super ADHD tangent and disparately needed to know a LASER works but... really glad this exists. I had the basic idea in my head but... I needed the details for me to get to sleep. Thank you.
This video is a VERY scientifically accurate description of lasers which is given at a year 1 level of detail. I love the dry humor of the English robot! Probably the best educational video I have ever seen!
I don't watch or sub to channels with electronic vouceo vers. The way I look at it is if you are too lazy to voice over yourself then I'm too lazy to listen or watch.
@@vernevens1598 When English is not your native language is really hard to explain something as technical as this. I've watched other "perfect English" explanations of the laser but they weren't nowhere near as good as this. Bottom line, the author did a great job and was forced to use the robot voice over while you're just ignorant and now I just feel sorry for taking my time to write you these lines as you don't really deserve any of this.
I came here to refresh my memory, but I learned a lot from this video! 7:55 - You encouraged me to learn about how magnets work 10:50 - Is that where the heat in lasers come from? 12:16 - No, this seems like much more wasted energy. 16:29 - The whole section answered all my questions about laser cavities. P.S.: For some reason, drawing eyes on circles made the video interesting instead of tedious. Learned something about didactics, too. Well played, sir. Well played.
The best education video i have seen so far. It explains all aspects and dors not make a lot of shortcuts. Would be even better if the quantum effects also was mentioned more in detail :)
0:00 History and Overview 1:50 Unique Properties 3:55 How a Laser Works 4:20 Stimulated Absorption 6:52 Spontaneous Emission 8:35 Stimulated Emission 9:52 Metastable States 11:40 Population Inversion 12:45 Light Amplification 14:15 Standing Wave (18:00 Imperfections)
Fantastic video with a solid in-depth explanation and enough detail to actually learn instead of mindless imagery with voice over! A definite thumbs up.
This is -by far- the best text-to-speech engine I have ever heard (well, at least that I could tell was T2S). I usually *hate* listening to T2S videos - but this one is actually palatable.
The excellency of this video is that it elaborates the MEANING of 3 importatnt phenomenons (stimulated absorption, spontaneous emission, stimulated emission). For instance, stimulated absorption means: an electron in the ground state, ABSORB the energy of a photon and get STIMULATED by that energy to the next exited energy level!
1. 20 minutes video 2. Robotic voice I thought of not watching this video but man, the concepts that you taught are phenomenal. I understood 1 whole big topic in just 20 minutes. Thanks a lot.
Really appreciate the video. Loved the British accented TTS. LOL ;) All of this is also found in the book, "Lasers, and Masers". Added to play list. Thanks for sharing.
In 2018 Springer Press (a leading science press) published posthumously "The Laser Inventor: Memoirs of Theodore H. Maiman." Maiman's memoirs explain how he came to invent the world's first laser in 1960, despite limited support from his employer (Hughes Research Labs) and in competition with all the major university and industry research laboratories around the world. It's a fascinating autobiography and important document in the history of science and technology. The book is available directly from Springer Press or via Amazon (hardbound or E-book)..
Great video, really enjoyed it! Can you make another part on the more practical side of things - how exactly do you get all of those atoms excited in a short amount of time. Especially curious about how you get a continuous laser beam going. With this explanation, I think I can understand how to build a pulse laser but still don't understand continuous energy pumping in the system. Also maybe a bit more on the actual design and components. Maybe even some more info on other types of lasers like chemical, solid-state, gas...
2:33 To my knowledge, white light is not a super position of all wavelengths of light. A super position is when two or more things exist at the same time without interaction (until measured) but light can very much interact with other wavelengths of light and all wavelengths can be measured at once.
I wish there these kinds of lecture videos for my high school lessons. But that wasn't to be. But now that I am in college, I'll make the most of your videos. Thanks a bunch!
Awesome video :D I have no words to praise how well you've explained. Simply explained, with very simple examples to which anybody can relate. We need to support such high-quality content. thank you so much for this awesome educational content.
Good one , very well prepared. Can be made part 2 for CW laser and the pulsed laser theory with a different kind of laser. Kindly explain stimulated emission with potential well.
it's amazing. We viewers are so happy and excited while watching the video. The content of the video is like a photon and it makes me to rejoice. thanks you team for this wonderful content. love from India - Tamilnadu.
The video is fucking amazing, i have read about laser today and it was a great before bed review, i found this robot voice also kinda cool as it talks in fairly natural way. everything was explained in details and really simple. thanks
I'm not convinced that v is the velocity of light in a vacuum. It should be the velocity of light in the medium (which is not empty space), which is equal to c divided by the index of refraction of the medium
This is one whole chapter in my academics, done in 20 min
Wait for papers now 😂
@Ameer Leonel fuck instagram, watch more laser videos
@Ameer Leonel no one gives a royal fuck about your shit
To be honest if you turn his explaination into text it will be a whole chapter of book , but Listening is easier
Shows how outdated the system for learning is
Bro created literally one of the best Videos to learn about Optoelectronics/Lasers (even on a Uni level) and then just stopped posting. What a God
Einstein: "This is how it works. Go build it."
*50-100 years later*
Engineers: "Tru."
welllllll without the internet information transfer was slower haha ya know?
@@dominicraico8599 Yeah, and without Einstein's dad there'd be no E=mc^2 till a bit later too.
Einstein in 1934: "There is not the slightest indication that atomic energy will ever be obtainable. It would mean that the atom would have to be shattered at will."
4 years later in Germany: Scientists split the atom at will/nuclear fission is discovered. Atomic energy obtainable.
Einstein was not an inventor. In no way did he know how LASER technology works, much less tell anyone how to build it.
So give credit to the scientists/engineers who actually invented and pioneered this technology.
Indra Therion
The history is interesting. Einstein did publish the theorie about “laser” light. The engineers told him that it is completely impossible to build. Over 40 years later a couple of engineers did not know that and after a couple of years managed to build the first laser. They introduced it to the world and sort of said: “We build it, know you have to find a use for it.”. 😂
4:30 The awkwardness level when a robot tries to replicate the human personal touch
4:30 "Hey there, little guy"
Jessie Robinson Hello there little boy. I'm the Pyro man.
lmao. I was gonna say the same thing.
@@Trident_Euclid Do you like M E M E S ?
Hey there Little Marco Rubio.
Jessie Robinson that’s what she said
This is the best explanation I've ever seen on the LASER, by far! The introduction is also one of the best explanations I've seen on atomic energy levels. Thank you!
A.I. is going to open the power of collected minds. Imagine Billions of minds connected via telecommunications to think and learn on subjects of interest and problems of consequence. All capable of transferring instantaneously.
13:54
Best Animation of a Wave Reflection!!
I don't remember why or how I went on a super ADHD tangent and disparately needed to know a LASER works but... really glad this exists. I had the basic idea in my head but... I needed the details for me to get to sleep. Thank you.
This video is a VERY scientifically accurate description of lasers which is given at a year 1 level of detail. I love the dry humor of the English robot! Probably the best educational video I have ever seen!
I don't watch or sub to channels with electronic vouceo vers. The way I look at it is if you are too lazy to voice over yourself then I'm too lazy to listen or watch.
@@vernevens1598 I'll give you this robot voice is very annoying but English may not be their native language.
Ironically my physics teacher's name was David Wright. Is that you??
He’s a robot?
@@vernevens1598 When English is not your native language is really hard to explain something as technical as this. I've watched other "perfect English" explanations of the laser but they weren't nowhere near as good as this. Bottom line, the author did a great job and was forced to use the robot voice over while you're just ignorant and now I just feel sorry for taking my time to write you these lines as you don't really deserve any of this.
I came here to refresh my memory, but I learned a lot from this video!
7:55 - You encouraged me to learn about how magnets work
10:50 - Is that where the heat in lasers come from?
12:16 - No, this seems like much more wasted energy.
16:29 - The whole section answered all my questions about laser cavities.
P.S.: For some reason, drawing eyes on circles made the video interesting instead of tedious. Learned something about didactics, too. Well played, sir. Well played.
One of the best lessons I come across . Just wow ! .
Congrats for making this topic easy.
this is the most tolerable synthetic voice i've ever heard. Thank you for the video, good stuff!
The best education video i have seen so far. It explains all aspects and dors not make a lot of shortcuts.
Would be even better if the quantum effects also was mentioned more in detail :)
0:00 History and Overview
1:50 Unique Properties
3:55 How a Laser Works
4:20 Stimulated Absorption
6:52 Spontaneous Emission
8:35 Stimulated Emission
9:52 Metastable States
11:40 Population Inversion
12:45 Light Amplification
14:15 Standing Wave
(18:00 Imperfections)
One of the most scientific videos I've ever seen. He describes so good and of course this is an underrated video.
Subscribed!
Jesus loves you
ua-cam.com/video/QPywCD-TSd0/v-deo.html
coming from How the Laser Happened (Townes). great animations and analogies. thank you.
Thanks for the book-title.
Very easy to understand and detailed explanation. Thank you
Brilliant explanation. Thank you!
Thanks , Sir . You saved us from lots of wasted web surfing. Your video is complete , compact, beautifully represented . Thanks Again
Thanks for posting this description and including the nuances of gain curve and material types.
Fantastic video with a solid in-depth explanation and enough detail to actually learn instead of mindless imagery with voice over! A definite thumbs up.
Thats the best laser video ever. Days searching for this infos in a didactic way.
Not bad at all! I worked with Lasers for many years. You've done a good job of explaining the physics so that the layman can understand, I'm subbing!
This was the best video explaining how lasers work that I have seen here on UA-cam.
This was perfect! Exactly what I was looking for. Thank you so much!
Wow. Just perfect explanation! Thank you so much!
I just like to say is that this Lasers Guide is the best i have ever seen before.
"That stuff every other video asks you to do"
Where is the merch?
This is -by far- the best text-to-speech engine I have ever heard (well, at least that I could tell was T2S). I usually *hate* listening to T2S videos - but this one is actually palatable.
8:18 So why things are ferromagnetic? Do you have that video you mentioned here?
this video seriously saved my life, thank you!
Thank you so much
You should make more videos
Your work is good than many other youtubers in this topic.
The excellency of this video is that it elaborates the MEANING of 3 importatnt phenomenons (stimulated absorption, spontaneous emission, stimulated emission). For instance, stimulated absorption means: an electron in the ground state, ABSORB the energy of a photon and get STIMULATED by that energy to the next exited energy level!
100/100 explanation and great animation 👍🏻🙏🏻
Great video, easy to follow and understand, thank you!
Hell of an amazing work by you it's lovely video and concepts are crystal clear 🤞🤞
Amazing video ! I knew about spontaneous emissions and stimulated absorption but not spontaneous emission, thank you !
The best explanation ever so nice and educative sir
1. 20 minutes video
2. Robotic voice
I thought of not watching this video but man, the concepts that you taught are phenomenal. I understood 1 whole big topic in just 20 minutes.
Thanks a lot.
Literary so amazing , I hadn't saw a video like this with so much detail. Thankyou so much for this video.
What an amazing video. I love science and people who make it fascinating to learn! Greetings from Colombia.
Really appreciate the video. Loved the British accented TTS. LOL ;) All of this is also found in the book, "Lasers, and Masers". Added to play list. Thanks for sharing.
In 2018 Springer Press (a leading science press) published posthumously "The Laser Inventor: Memoirs of Theodore H. Maiman." Maiman's memoirs explain how he came to invent the world's first laser in 1960, despite limited support from his employer (Hughes Research Labs) and in competition with all the major university and industry research laboratories around the world. It's a fascinating autobiography and important document in the history of science and technology. The book is available directly from Springer Press or via Amazon (hardbound or E-book)..
Very good explanation ! Thank you !
Fantastic. Very informative ....nowhere such information in such concise manner available.
Very very very informative. Thank you for creating this video, it helps me a lot with my project!
Great video, really enjoyed it!
Can you make another part on the more practical side of things - how exactly do you get all of those atoms excited in a short amount of time. Especially curious about how you get a continuous laser beam going. With this explanation, I think I can understand how to build a pulse laser but still don't understand continuous energy pumping in the system. Also maybe a bit more on the actual design and components. Maybe even some more info on other types of lasers like chemical, solid-state, gas...
@ 19:17 This is going on here: en.wikipedia.org/wiki/Spectral_line#Line_broadening_and_shift
2:33 To my knowledge, white light is not a super position of all wavelengths of light. A super position is when two or more things exist at the same time without interaction (until measured) but light can very much interact with other wavelengths of light and all wavelengths can be measured at once.
I wish there these kinds of lecture videos for my high school lessons. But that wasn't to be. But now that I am in college, I'll make the most of your videos. Thanks a bunch!
"we dont want just a single puny photon,we want lots..." LOL
Didn't expect this to be very good, was pleasntly surprised. Godd job on this one (:
Awesome video :D I have no words to praise how well you've explained. Simply explained, with very simple examples to which anybody can relate. We need to support such high-quality content. thank you so much for this awesome educational content.
Perfect introduction to something very complex in an easy and understandable manner. Liked it to the end.
Cool demonstration 🚀🚀🚀!
Sure!
Thanks for the informative content
Great explanation, n corresponds to the antinode/node
Good one , very well prepared. Can be made part 2 for CW laser and the pulsed laser theory with a different kind of laser. Kindly explain stimulated emission with potential well.
that's our chapter.1 in Lecture uni, so useful
it's amazing. We viewers are so happy and excited while watching the video. The content of the video is like a photon and it makes me to rejoice. thanks you team for this wonderful content. love from India - Tamilnadu.
Really really super explanatory video!!! althougth robotic voice is anoying !
Do not be rude.
@@NoobMaster-or2jfit's a critique.
JazakAllah Bhai
It really helped a lot
Very clear and complete understanding provided.
Fantastic video! Hope you get around to producing more one day.
This video is surely more informative... worth it
Wow... not just a synthesized voice... but a synthesized voice with a British accent. Steve Hawking would be so jealous.
Actually a really cool vid that I found extremely simple to follow 👍
Brilliant video, thank you for explanation ^^
Gagab sir gagab maja aa gaya 🤣
Ohhhhhhhhhhhhhhhhh dammmmmmmmmm. That was smoothly explained!
It's so accurate and really detailed video. it's so helpful.
Very good video! Didn't quite get how lasers worked till now
Wow, excellent explanation. Both scientifically accurate and simple to understand.
took me a while to realize the narrator was a computer. nobody can say metastable state with such equal perfection each and every time. 8P
Would consonant resonance in an electrical circuit mean that the electromagnetic waves are in a coherent state?
God bless you man I learnd a lot
Well you sure didn't learn vocabulary .did you
Nicely explained. Good One.
This is fucking great, it covers all the subject of lasers in a great way.
The video is fucking amazing, i have read about laser today and it was a great before bed review, i found this robot voice also kinda cool as it talks in fairly natural way. everything was explained in details and really simple. thanks
Beautifully explained. Thank you.
Good lecture on laser basics. My thanks
such an amazing and educational video
Excellent video. Coherent and accurate.
Very nice and detailed. Really loved it
I'm not convinced that v is the velocity of light in a vacuum. It should be the velocity of light in the medium (which is not empty space), which is equal to c divided by the index of refraction of the medium
what software is used for Text-to-Speech conversion ?
this video really make me love science
This is very useful!
what book do you use?
I learned a lot! Very nice video.
Thank you. VERY educative
Thanks for your efforts ❤
super se bhi apar ....thank you creator ..you are doing amazing work . Hats of to you sir ..
Hello. Does laser meter work when the weather is foggy? Thanks
nice video - direct and = good understanding
Very insightful and helpful thank you so much😍
Beautiful explanation. Love the voice
Thanks for the lesson!
Perfect informative video! Explained everything so well and provided a lot of information in a very good amount of time.
Very good explanation
Great video! super helpfull! Thank you