Smarter every day + minute physics + vsauce = youtubers getting really smart. I love all the collaboration I've been seeing lately - you guys are awesome!
When I was ~10, I always assumed that the only way a laser would work is if the light gets reflected back and forth between to mirrors, amplifying the beam, and somehow magically passed through one of them and now that 5 years has gone by I finally feel enlightened about how this idea could possibly work.
@@pianoraves Thank you! I’m pretty close to getting a bachelors in aerospace engineering and I’m also researching how one would use phase differences between antennas to find the direction a signal is coming from. I hope things are going well for you too!
Hey Destin, i think you should revisit this with some more detail and experimentation. Everyone loves lazors, but i feel this could have some more fascinating explanations and information added on. Just an idea bro!
Dude, I really feel like I actually get smarter from the stuff you make. You're pretty good at explaining it and showing it in a cool way. This is the kind of stuff I started watching Discovery for, before they kind of lost their way and started doing other weird shit.
It’s nice seeing this video again. I used a similar looking laser in community college a few years back to observe how different apertures affect the patterns that light forms on a wall from a known distance.
@joeandbuzz Buzz (I know it's you). They're blue because they're made to filter out certain wavelengths of light. In this case, the wavelengths associated with a He-Ne laser.
The mirrors are "perfects", reflecting much better than those we use in bathroom. The shape is flat... a tiny bit concave to force any photon that was bouncing at an angle to get back in line. The is a tiny hole at the center of one mirror to let a small percentage of photons, such as 2%, to exit after having been reflected 50 time or more. This hole is the reason a laser emit a narrow beam of light. The beam diverge a little over large distance. The best laser firing at the moon get a beam a few miles wide. The air make it impossible anyway to keep a beam focussed. The laser "tsunami" from spectra physics create 10 pulses per second with light so intense that the air ionize, creating a super sonic boom on each pulse. It sounds like a whip slapping fast or lightning, which are example of white noise created by all frequencies meeting at the same time when the sound wave catchup with the air molecules, which moved above the speed of sound.
I work for a company who makes some of the equipment used in this video. So nice to see it in use. I'm lucky enough to have a job that requires me to use the equipment in our lab, but it's not quite the same as seeing a real world experiment using it.
How lasers work In a nutshell: Light bounces back and forth between two mirrors. The light intensifies between the mirrors. One of the mirrors has a tiny hole to leak out some of the photons.
@@bushelfootYeah, just like the capacitors for supplying sudden huge drawing amperes in various devices such as subwoofers or electric motors and so on👍🏻
hi destin... every time i watch your video...it blows my mind... and learn new things from it... so i have this very weird thing that i hope you can explain why superman have this powers in our planet while they dont have that power in there own world...
It's a region in The Netherlands. About in the middle on the east side bordering Germany. University of Twente in Enschede is (afaik) a pretty well-known technical university.
So it's my understanding that the light energy bounces back and forth between the two mirrors (one being just less reflective than the other) until the beam breaks through the less reflective mirror which results in beam emission. That tells me that there is a substantial energy loss. Most of the power remains inside the open cavity tube allowing only a lesser percentage of the power to escape. We have auto reactive welding masks the lenses of which are transparent until the goggles detect the higher light energy emitted by arc action. The lenses of the goggles automatically darken to protect the welders' eyes, then return to transparent once the more intense light ceases. Would there be any way to create an auto response mirrored surface that would react in similar fashion? With such a mirrored surface, the two mirrors (one being a stable full reflective mirror at the back end of the laser) could be made completely reflective until such time as beam emission was desired allowing for full power emission instead of partial.
+Connor Hill It's CRYSTAL CLEAR there is no hazard of this laser being shined "directly" in anyone's eyes and the scattered reflections from a 5mW laser are harmless. That was my point, Einstein.
This video is relevant for sections 15.1 and 15.2 in the book "Fundamentals Of Photonics, Second Edition" in my course "Optics & Photonics" at LTU in Sweden. I am pointing that out here as a reminder in case I forget, lolz.
This may have been pointed out before but the caption titles for "what Johan is saying" and "what Destin thinks he is saying" are mixed up. The funny version is under "what Destin thinks he is saying".
I always thought that lasers worked by pushing energy into atoms inside a semi-silvered capsule to the point that the outermost electron becomes excited to the point that it jumps out to the next electron shell, then immediately releasing the excess energy by releasing a photon and falling back into its original electron shell. I thought that these photons bounced around in all directions in the semi-silvered capsule until they met the semi-silvered end caps of the capsule at the correct angle so that the photons could pass through, to create a laser beam.
Hey SmarterEveryDay from Nepal! Love your videos and have been watching a lot of your videos lately. I am getting Smarter with every video of yours. I have a question and it might be stupid but here goes... The light is being reflected back and forth using the mirrors that are facing each others right. If the mirrors were 100% reflective (No loss at all) and we removed the source of light, what would happen? Will the light still remain since the light is being reflected back and forth? Again, this might be stupid question... Thank you for the awesome videos.
Photon Torpedoes, Destin? While pointing at a Star Wars shirt? Unaxcceptable. But since I love your videos and I shall forgive you. Keep doing awesome things!
It's mainly because of regressive voice assimilation and other small articulation thingamawuts that occur naturally in Hollandic Dutch and they then transfer to their English
Hey a cool video idea, so about a month ago I had my dad shine my 500mw green laser into the sky at night as I walked to the other side of the house to see if you can see the beam from the side and as I looked up it looks like they are shining the laser tilted towards you because I had no point of reference and because it shined miles into the air
"I'm working on a weapon of mass destruction."
"Excellent."
Indeed
😂
Any progress 😀
😂😂😂😂
Smarter every day + minute physics + vsauce = youtubers getting really smart. I love all the collaboration I've been seeing lately - you guys are awesome!
When I was ~10, I always assumed that the only way a laser would work is if the light gets reflected back and forth between to mirrors, amplifying the beam, and somehow magically passed through one of them and now that 5 years has gone by I finally feel enlightened about how this idea could possibly work.
Yoo this is an old comment I hope you're doing well and still having a thriving interest in stem
@@pianoraves Thank you! I’m pretty close to getting a bachelors in aerospace engineering and I’m also researching how one would use phase differences between antennas to find the direction a signal is coming from.
I hope things are going well for you too!
I used to think that there was a small hole for some of the light to leak away instead of partially transparent mirror.
Hey Destin, i think you should revisit this with some more detail and experimentation. Everyone loves lazors, but i feel this could have some more fascinating explanations and information added on. Just an idea bro!
+SoloFlightProd agreed
Dude, I really feel like I actually get smarter from the stuff you make. You're pretty good at explaining it and showing it in a cool way. This is the kind of stuff I started watching Discovery for, before they kind of lost their way and started doing other weird shit.
What a nice guy in nice to hear him telling peeps to go to school
leuk om te horen dat deze nederlander ook zo`n leuk engels/nederlands accent heeft
Weet Ik
dat heeft bijna elke nederlander :)
Ja. Dat is zegmaar ons ding. Om een engels/nederlands accent te hebben. Je kan makkelijk horen dat hij nederlands is.
Ishij nederlands ?
Ja
It’s nice seeing this video again. I used a similar looking laser in community college a few years back to observe how different apertures affect the patterns that light forms on a wall from a known distance.
I was just studying about He-Ne lasers, thanks for the great video!
I'm Dutch myself and I was surprised this was in The Netherlands :D I follow your videos for months and you're getting me smarter every time :)
How´s life now?
Pretty good actually! I still follow this channel. Never thought I would get a comment 11 years later hahaha
Duurt lang met die torpedo's Johan!
Peter Timowreef Johan pakt jou
Dylan Koster
"pakt mij"..? Gaatie me tjoepen met een niefa zeker.
ah, geef het nog een paar jaar :p
ja egty he xD
Peter Timowreef vnbjvnhhjufye
@joeandbuzz
Buzz (I know it's you). They're blue because they're made to filter out certain wavelengths of light. In this case, the wavelengths associated with a He-Ne laser.
Destin, Love everything about your channel. I use your videos in homeschooling my kids. Keep up the great work.
Matthew Richardson Wow 😁
I always feel happy after watching your videos
Hi Destin. I watch all your videos and some of them are really good. For this video I was hoping to get some detailed explanation about lazers.
it's awesome when you can understand johan.
but photon torpedoes aren't from star wars
They are from star trek right?
Star Wars has proton torpedoes.
Nothing beats an anal torpedo.
+PisaniProductions Nothing beats emptying an otherwise useful torpedo just to throw Spock's body onto a planet.
I was waiting for somebody else to notice this...
I live in the Netherlands!
And I can't tell you how glad I am you din't call it Holland!
Thanks!
Light Amplification by Stimulated Emission of Radiation.
I learned that while playing a Kirby game. :D
You beat me to it. Time we bring smarts back en vogue.
Hey I really like the way you are linking your videos with other people who also are good at explaining these things to us!
The mirrors are "perfects", reflecting much better than those we use in bathroom. The shape is flat... a tiny bit concave to force any photon that was bouncing at an angle to get back in line.
The is a tiny hole at the center of one mirror to let a small percentage of photons, such as 2%, to exit after having been reflected 50 time or more.
This hole is the reason a laser emit a narrow beam of light. The beam diverge a little over large distance. The best laser firing at the moon get a beam a few miles wide. The air make it impossible anyway to keep a beam focussed.
The laser "tsunami" from spectra physics create 10 pulses per second with light so intense that the air ionize, creating a super sonic boom on each pulse. It sounds like a whip slapping fast or lightning, which are example of white noise created by all frequencies meeting at the same time when the sound wave catchup with the air molecules, which moved above the speed of sound.
I work for a company who makes some of the equipment used in this video. So nice to see it in use. I'm lucky enough to have a job that requires me to use the equipment in our lab, but it's not quite the same as seeing a real world experiment using it.
is it named after a Norse god by any chance
-did you call me something
-nee
xD
We basically knew everything you talked about in that video already but we liked seeing that you knew it. Awesome Destin!
How lasers work In a nutshell: Light bounces back and forth between two mirrors. The light intensifies between the mirrors. One of the mirrors has a tiny hole to leak out some of the photons.
Laser resonater helps to populate the photons making the light more powerful.
I wonder if this is enough of a summation for my HeNe laser prac report 🤣
@@bushelfootYeah, just like the capacitors for supplying sudden huge drawing amperes in various devices such as subwoofers or electric motors and so on👍🏻
It was just so cool to see minutephysics' video and yours right next to each other in the subscription box :)
"In fact, they're weapons from star trek, not star wars." he must've been kidding.
Thank you Johan. Thank you Destin.
You should team up with Photonicinduction
such a good way to begin my day with this video!
HIS NAME IS NOT JOHAN. HE IS THEON GREYJOY.
LOOOOOOOL
No it's reak!
HA! now that you said it, he really does look like him xD
Yep, I totally am.
Bluefan heon greyjoy with lasers. How cool is that!?
I've always wondered how they work, awesome video, man!
Photon torpedoes are from star trek, not star wars ;)
The MG7-A which Luke used to destroy the first Deathstar was a proton torpedo, which could cause the confusion as it sounds similar :D
Was about to mention it !
him88v8 yeah, Luke uses a proton torpedo I think
I'm sure that will be a large portion of the comments. I didn't even have to scroll down to know this thread was here. lol.
oh my god, you can read the screen. good job.
oh sweet you both put put links to each-other's videos so i can go on an indefinite loop, possibly forever, and become a laser genius!!
The train in NL has internet connection ? Mind Blown :o
What kind of third world country do you live in where trains don't have internet connection?
One of the best channels on youtube! Your the man destin!
Hey its me destin being chill at uranus with my alien buddy jakasmdmdks today we are going to learn about dark energy’s origin
i'm subscribed to you and minutephysics so it made me happy when i saw you guys linking :D
Like als je Nederlands bent
+michiel hoebeeck lol waarom ook niet
+marijn177 yay
Thank you Johan!
NEDURLAND!! :D
Je kan echt horen dat-ie Nederlands is hahaha :P
Zeker!
I bought an LPM from Johan, he is the best guy ever!
Dutch are best
I LOVE the end music, it needs to be on itunes!
first video ive seen with no bob comments!!!
i know,right?
☻/ This is Bob . Copy and paste him
/▌ all over UA-cam
/ \ so he can take over and take down Google+
haha its a joke
TheMegamario50 UA-cam thinks your "die" translates into "the".
haha
this channel is like what every slow motion channel was meant to be.... nice work there..
+1 subscribed
Soy solo un comentario en español pasando, permiso :3 #MinutoDeFísica
Yo también :3
New Player fodasse
Yo igual
Saludo amigo, desde Texas 🤠👋
hi destin... every time i watch your video...it blows my mind... and learn new things from it... so i have this very weird thing that i hope you can explain why superman have this powers in our planet while they dont have that power in there own world...
Nederland oh Nederland
i don't remember when i subscribed this channel, but I CERTAINLY DON'T REGRET IT
i almost decided to study physics in twente
anotherKyle in what?
It's a region in The Netherlands. About in the middle on the east side bordering Germany. University of Twente in Enschede is (afaik) a pretty well-known technical university.
Touwtje Ah ok why'd you decide not to then
+IndustrialDonut Oh, I was not the original post. I happen to live close to the university which is why I elaborated.
Touwtje Oh right lol I should have caught that ^.^
so many applications for measurements with a configuration like this
i don't need no subtitels my native language is dutch XD( ik heb geen subtitels nodig mijn alledaagse taal is nederlands XD)
oke
Heel boeiend man
oja btw foute gramatica (double negative)
in mn aars
aarskanker
Omg its 2017 at the time of me writing this and man, Destin looks so much younger. It's crazy
But...you didn't explain how lasers work.
misteratoz Yeah, but in the recomended video is an explication 😁
what an appropriate shirt ! thanx so much for explaining !
Laser limbo
So it's my understanding that the light energy bounces back and forth between the two mirrors (one being just less reflective than the other) until the beam breaks through the less reflective mirror which results in beam emission. That tells me that there is a substantial energy loss. Most of the power remains inside the open cavity tube allowing only a lesser percentage of the power to escape.
We have auto reactive welding masks the lenses of which are transparent until the goggles detect the higher light energy emitted by arc action. The lenses of the goggles automatically darken to protect the welders' eyes, then return to transparent once the more intense light ceases.
Would there be any way to create an auto response mirrored surface that would react in similar fashion? With such a mirrored surface, the two mirrors (one being a stable full reflective mirror at the back end of the laser) could be made completely reflective until such time as beam emission was desired allowing for full power emission instead of partial.
So I like your videos and how they are very slow but a few videos that go more in depth or are longer would make me very happy!
I'm always amazed at the number of non-native-English speakers who actually speak English very well. Needless to say, Johan is one!
I love it. Wearing safety glasses for a helium neon laser less powerfull than a modern dollar store 5mW laser pointer.
+Connor Hill It's CRYSTAL CLEAR there is no hazard of this laser being shined "directly" in anyone's eyes and the scattered reflections from a 5mW laser are harmless. That was my point, Einstein.
Ok, I'm a bit late, but you, sir just got ROASTED!!!
And Connor Hill, You really know how to sentence an argument. Well done.
I'm working on it.
He is my hero.
thanks destin, made my day!
Welcome to Holland!
Welkom in Nederland!
Thanks, I finaly figured out how this works.
this pleases me for i am dutch and a huge fan of smarter every day and physics in general. and if it ain't dutch it ain't much ;)
I built one of these for the first time in Intermediate Lab this semester! Science is so much better when you can understand it.
This video is relevant for sections 15.1 and 15.2 in the book "Fundamentals Of Photonics, Second Edition" in my course "Optics & Photonics" at LTU in Sweden.
I am pointing that out here as a reminder in case I forget, lolz.
I love how you referenced eachother's videos. :)
I was at ESA ESTEC in Holland about 1.5 mo. ago. It was a great time!
I love your vids Destin. Keep it up
Destin, you're so nice to everyone else you forgot to put a link to your facebook.
the colour is defined by the gas, different gasses will emit different coloured light
The last part was the best!
This may have been pointed out before but the caption titles for "what Johan is saying" and "what Destin thinks he is saying" are mixed up. The funny version is under "what Destin thinks he is saying".
Jason Axford Yeah 😁
Laser Limbo definitely sounds like lot of fun :)
@johanreinink
Johan everybody, right here.
prepare for 10x views. Minute Physics is your... godsend..
@CoDisafishy
Dutch accents are hard.
by the way laser is the acronym for Light Amplification by Stimulated Emission of Radiation
Very nice video...what would be the energy of such a laser?
I always thought that lasers worked by pushing energy into atoms inside a semi-silvered capsule to the point that the outermost electron becomes excited to the point that it jumps out to the next electron shell, then immediately releasing the excess energy by releasing a photon and falling back into its original electron shell. I thought that these photons bounced around in all directions in the semi-silvered capsule until they met the semi-silvered end caps of the capsule at the correct angle so that the photons could pass through, to create a laser beam.
Hey SmarterEveryDay from Nepal! Love your videos and have been watching a lot of your videos lately. I am getting Smarter with every video of yours. I have a question and it might be stupid but here goes... The light is being reflected back and forth using the mirrors that are facing each others right. If the mirrors were 100% reflective (No loss at all) and we removed the source of light, what would happen? Will the light still remain since the light is being reflected back and forth? Again, this might be stupid question... Thank you for the awesome videos.
It was weird to see this vid and the minute physics vid side by side in my sub box.
Photon Torpedoes, Destin? While pointing at a Star Wars shirt? Unaxcceptable. But since I love your videos and I shall forgive you. Keep doing awesome things!
It's mainly because of regressive voice assimilation and other small articulation thingamawuts that occur naturally in Hollandic Dutch and they then transfer to their English
this is help full for basic concept of lasers
that's very nicely formulated sir ;)
thank you, i didnt understand the video by minute physics at first, now i do :)!
This was awesome!
love your t-shirt
awesome video.
i love all ur vids
thanks for posting
Nice frequency is electro magnetic and produces light now that I understand but green color or blue it’s only a diode right
Destin, i trust you to deliver.
(hitting "like" before finishing the video, and never being disappointed)
:D
Awesome stuff, learning exciting
is it powerful?
vsauce, smarter every day, and minute physics should all make a video together.
Hey a cool video idea, so about a month ago I had my dad shine my 500mw green laser into the sky at night as I walked to the other side of the house to see if you can see the beam from the side and as I looked up it looks like they are shining the laser tilted towards you because I had no point of reference and because it shined miles into the air