What Happens to Lasers Underwater? (Total internal reflection) - Smarter Every Day 219
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- Опубліковано 19 чер 2019
- Original Video on 2nd Channel: • Why Does A Flashlight ...
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Snell's Window
en.wikipedia.org/wiki/Snell%2...
Total Internal Reflection
en.wikipedia.org/wiki/Total_i...
An excellent video by the Engineer Guy about how fiber optic cables work:
• Fiber optic cables: Ho...
Index of Refraction:
en.wikipedia.org/wiki/Refract...
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Destin - Наука та технологія
I found this link later that night while fishing. twitter.com/smartereveryday
Did you check the local news the following day to see how many UFO sightings were reported?
SmarterEveryDay hey can we hang out?
SmarterEveryDay “how do you know you got laser googles on dude” 😂😂
You should try it with one of those spherical fushigi balls, the internal reflections in the sphere is amazing looking. If I had mine still I'd take a photo of it but you gotta try it.
Dustin this made me think. If one could make the crystals in the glass refract in the perfect way, would you be able to project an image in the glass.
Most people: "That sounds nice"
Destin: "That's Acoustically pleasing"
came down here about that lol
yeah .. i envy him for his child like everything is amazing view of the world .. guess that's why people have a second childhood when they care for their children
When's Destin gonna do ASMR?
It's "Engineers," a dialect of spoken language from an engineer.
Destin sounds stoned to be honest... :)
I just watched 2 grown men play with lasers in kayaks for 13min and loved every minute of it.
Giddy nerds and it's awesome. :)
Half the fun was the Looney Toons style pulling random heavy objects from improbable small containers.
14* cuz there only 5 secs
Just two guys, stoned by science. Who said we need alcohol to have fun.
Science!
pov: you're a fish and two aliens start sticking lightsabers into your house
"See it's the aliens! I told you Jimmy didn't move to florida, he was abducted and dissected!"
"You can tell it's an aspen because of the way it is"
Sick reference
Hehe that's pretty neat!
Huh
Where’s that from, I’ve heard it somewhere
@@thatjoshwright5577 Neature Walk
"how neat is that"
I don't think I've ever seen Destin so excited about anything...except Laminar flow
Laser with laminar flow maybe?
Total internal reflection on a laminar flow
Watch the hand held Tesla gun video :). He was freaking out on that one.
Should've seen him at NASA.
Approved! 👍
Officer: Do you know why I pulled you boys over?
Destin: frickin’ lasers man!
Hahaha, I've had a cop say almost exactly that phrase to a mate and me, because we actually were playing with lasers while driving along - we were young, and perhaps stupid.
Two American gentlemen wearing laser googles in the middle of the night in kayaks on some random lake armed with lasers and forms of acryllic.
"pass me the fiber optics."
Nothing suspicious here, move along
err Make a "Googles" k let's do sumich
> sitting in the dark
> only source of light is headlamps
"hey lets stick them in the water"
Destin: Full scientific explination of random thing
Also Destin: LIGHTSABER NOISES!!
That is the reason why he is my spirit animal :D
Why I love this channel and all content Destin makes
You can't tell me you could resist the urge to make lightsaber noises
how is this not the title "dudes with frickin lasers on kayaks "
Goobers with frickin lasers on kayaks
Destin: **uses lasers in the water to do science**
The fish: TIME TO GET *_FUNKY_*
7:27
Destin: You can tell that it's an aspen cuz of the way it is
We love a science man who knows his meme literature
That's pretty neat
Wow. What a beaut.
@@trickytreyperfected1482 I respect it's neatness
Hmm yes the tree is made of tree
How neat is that?
7:26 "You can tell that it's an Aspen because of the way it is" I CAUGHT THAT REFERENCE AND I LOVED IT
It was such a neat reference! And dropped so casually too lol
That’s pretty neat!
"I'm going to quit talking and just do stuff."
-Life goals.
I'm going to quit talking and just do stuff
2 seconds later: *It's a light pipe*
*keeps talking*
Lol, that throwback, "you can tell its an aspen, cause it is". You're awesome Destin!
10:21
"That's fun. We're having fun! We're learning things! We're learning things on kayaks with lasers!"
It's got to be said - Destin's enthusiasm and joy at figuring out, testing and playing with the world and all the amazing things in it is truly infectious.
The sheer _delight,_ almost *_bursting_* out of him as he watches a laser reflect off the surface of some water, or illuminating the little globe as it hit the meniscus, can pry and dig its way through the prickliest bad mood and soon enough, you're entranced as well.
I know exactly what's happening - I remember all of this stuff from High School Physics and saw much drier versions of these demonstrations back then. Seeing it performed by a guy who's exploding with happiness that he gets to see this stuff, and overjoyed that he gets to share it with other people makes the whole exercise a *_LOT_* more fun however.
I'm so glad I found this channel.
13:41
"So, I hope you enjoy this half as much as I do . . ."
Destin. Dude.
You enjoy all of this stuff enough for *_everyone._*
That's so right
I didnt read it all :(
That kayak must use the same technology as Minecraft Steve’s inventory
lmao
Hey thanks for the likes yall
L00PdeL00P's Channel
nice
L00PdeL00P 1000th like... didnt read the comment.😂 edit: glad i read it
8:13 Destin: "u could make a camera that could see all the way to the bottom"
Mark Rober: "time to get to work"
Yoooooo that would be lit. A collab like that would be so epic!
@@sky3fall866 they have collaborated before, on one of the pool videos I think. Also, this approach has already been done to make fiber optic cameras for surgery and intravital microscopy. So cool.
However,. You'll soon realize it's only going to transmit one big fat pixel of completely scrambled rays of the image at the light pipe objective end.
I know you know about fiber bundles. You get fiber pixels, each fed from an image ray, but still scrambled, only less scrambled. Each pixel is correctly lit and colored. But translates to the wrong spot.
So that bundle has to be built with the bundled fibers in perfect alignment. But then it won't flex.
So you can fuse just the ends of the bundles then cut and polish them, and insert the thing into a protective flexible hose.
Interestingly, because of the physical characteristics of molten glass, if you pulled a softened bundle, you would keep the pixel organization, but get higher resolution, since the bundle gets thinner. But it's also stretching longer, so you can cut it into multiple bundles an regain the original objective surface area. (with some loss due to cutting and polishing ends again).
I've wanted to try to create a fiber coupled high resolution digital imager by printing a space transformer to align bundles in this jig, such that the imager end of an optical camera front end can be paved with an array of bundles, but the output end of each bundle illuminates the for of its own imaging CCD device. It would have to be an assembly that mounts onto a PCB with an array of CCD imaging devices, probably in contact with the die, otherwise it would be out of focus.
Alternatively using a lens to focus the bundle image on each die.
A hack to get a 16 8Mpix imagers looking at a piece of one image, for drone recon, or an astro-cam for a telescope.
@@ipbatinic Oh yeah well...
you're a pixel.
Introducing Islam Abdul Wahab Luqman official pp
Hey Destin, I just wanna let you know that you have changed the course of my life. I started watching your videos a couple of months ago and three weeks ago I decided to study Mechanical Engineering. I'm dead set on that now and I'm excited to live the rest of my life in fascination.
How are your studies in mech eng going?
"Wheres my laserr" Hes so excited
It’s the funniest and most wholesome thing ever
@@willrands1532 yes
I adore Destin cause he always gets super passionate about things. This whole video was great to watch cause he was so excited and happy about a specific phenomenon
*DISCLAIMER: NO alcohol was consumed prior to or during the making of this video All giggles were caused strictly by science overload.* Hahaha
*Remember to always science responsibly.*
Gtfo
Also, don't science and drive.
Except me, I will happily admit I am smashed :/ By that I mean I am Drunk and Possibly have a Problem. Just Call me "SleeveHeart"
Quote from my physics teacher: "You don't need drugs when you've got physics"
Hello, everyone... My name is Andrew Hagadone. I am a scientolic. My first experience with science was when my older brother got me interested in space.
Dude your enthusiasm for this is infectious; I love the relaxed yet excited atmosphere, it's inspiring.
With that infectious enthusiasm, I can totally imagine him in a dark alley smiling while holding a bloody knife.
"You can tell it is an Aspen 'cause of the way it is."
I love how he has seen and can quote Nature walk.
I like your profile picture.
Ps: I also like Wintergatan ;)
Those nature sounds stir up a serious bit of nostalgia & wanderlust. Great vid
Destin: That's acoustically pleasing.
Everyone else: That sounds nice.
Does Destin ever stop sciencing?
Yeah, give him a lightsaber, lol, swoosh!
Simple answer: Guy goes Bass fishing at night in Alabama. Fails to catch fish but occupies himself and fishing buddy by illustrating total internal reflection. I would have switched to black top water lures.
"oh, oh that's acoustically pleasing. You'll wanna hear that"
“It’s moving my “Kayak” because it’s soo big” 😂 that’s what he said, I love this guy 😂
*_A dose of Smarter Every Day is good for the soul_*
im Not Lookin to Manage symptoms,,, Im Lookin for the cure... HA h ah h ha hah ahaaaa MKUltra does a Body Good Right Ha h ah ha aaaaa,,, just kidding... havin a lil fun,,,
He sure is Smart i'll give you That one hands down...
but He Ain't catchin fish... might as well cut Bait;. HA h hahahaa
*Yeah very very good*
daily dose
Life Progress - Health, Wealth, & Happiness Channel how did you get it to be slanted and bold at the same time?
Is it possible to overdose?
"You can tell it's an aspen because of the way it is."
That's neat!
Christoffer Bader That's pretty neat!
Ben Sessions he wants everyone to know how neat science is. Instead of just him knowing it.
@@bensessions3753 That is pretty neat! But it's also why I always try to pack some he - - pack a gun
Hey! I think you're pretty neat but I respect your distance...
What a beaut!
Career cnc co2 laser operator here for ever a decade. This has been one of the coolest laser light tricks i've seen in years. Kudos.
This is also a huge concept in my industry where we use ultrasonics to examine welds for things like cracks in pipelines and pressure vessels. This makes the whole idea of Snell's Law make so much more sense and being able to visualize it was really cool! Thank you
"That's acoustically pleasing" is totally how I compliment music from now on
That's the awesome thing about English, in German the translation would not nearly sound that cool :)
Everyone: "That sounds nice."
SmarterEveryDay: "That's acoustically pleasing."
This channel is just about a nerdy guy having fun with other nerds.
Destin,
I have been playing with light and water all my life.
I love your enthusiasm for all things physics.
I love how you low-key dropped in “you can tell it’s an aspen because of the way it is” from Neature Walk. Well done
Picnic Chicken I'm only in the comments hoping to find someone else who heard that too 😂
@@curtp8105 Sameeee 😂😂😂
I flipped out when he said that haha.
Dude I literally screamed “NO WAY HE JUST SAID THAT” 😂😂😂
I don’t even know you all and I already love you! 😂
Perfect excuse against
Wife: "But you already went fishing last week"
"Didn't you go (to the grocery store|shopping|to the bathroom|breathing|regexing) last week?" - because regex is a kind of fishing... sort of... but not really.
The only response any bloke will ever need "Yes, but this time we have lasers!"
I wish my school taught it with visuals. I know about TIR and realised it the moment I saw it but didn't know it was so beautiful. Thank you Destin. You are the Real G.
This was so much fun to watch. Thanks for sharing these moments of curiosity and knowledge. Your pure joy is contagious and reminds me of that familiar hilarious thought, “I wonder what people think I’m *actually* doing right now because they’re probably wayyy off”. Amazing 💕
Amazing 👍👍
Your next project should be the underwater camera tube.
Seconded!
Thirded
One hundred eight sixthed
I think they worked out an "underwater" rig when filming guns underwater and cavitation bubbles when working with the Slo-Mo Guys. IT used Two mirrors and reflections...
Somebody call Mark Rober.
Me: That sounds good
Destin: That’s acoustically pleasing
Better than the younger generations: that sound lit bruh
Coming back months later because your enthusiasm and joy always makes me smile. :)
This is so cool... I never thought of this way to demonstrate reflection and refraction... Thanks.
“You can tell that it’s an aspen because of the way it is”
Now we now, for certain, that Destin is a man of culture.
that's pretty neat
My eyes are excited
Huzzah, a man of quality!
That's some good neature!
How neat is that!
10:18
imagine another far human sees that in the middle of the night at a lake.
I would live in doubts for the rest of my life.
Yeah, another alien video on the internet then.
Thought the same thing when he did the light saber and the Christmas ornament. I bet it looked heckin' spooky!
Osama Alhazmi bro image what the fishies think 😂
@@peterbillings3276 dog rates?
@@0num4 uhh, I dont get it :/
just wanted to point out how much you have my respect for reading Just Mercy, and reflecting on it too (in addition to literally everything else that is amazing on this channel haha)
Destin does an excellent job showing how the principles of fiber optics work in an intuitive way. Some of the earliest experiments that led to what we know as fiber optics today began by observing how light was contained in the streams of illuminated water fountains in the late 1800s. As for transmitting an image using fiber optics, the technology has actually been around since the 1950s. They are called "image guides" are used in the medical industry (endoscopes), the military, and some other industrial applications.
that’s amazing that technology has been used since the 1950s!!
Destin: I would like to tell you about a book that made me internally reflect as well.
Well played...
I read this as he said that😂🤣
Jerry Seinfeld: Comedians in a car getting coffee.
Destin: Dudes on kayaks playing with lasers.
I smell a new show here.
In the dark
@@evandavis5223 Has to be in the dark for effect. :)
What's the deal with that
8:20 omg that laugh!! 😂 gotta admit tho, its kinda weird stuff to take on a midnight kayak trip... 😂
Thank you so much for taking the time to show us all these cool things and inspiring scientists for years to come.
"Learning things on kayaks with lasers."
Make that a shirt! Boost this comment and see if Destin will go for the idea!
Design thought: rustic looking font and colors: brown on a beige shirt. Silhouette of a man in a kayak reaching below the water with a neon green line coming from his hand bouncing off the water line. Or holding a thick neon green light saber (acrylic rod)
Possibly even put "smarter every day 219" in smaller font below the quote. Nothing wrong with advertising intelligent and entertaining program
I second that motion
AYE!!
I third that
I'll buy it
Common people we need 1k likes to get this comment to the top! I want this t-shirt too!!!!
*Pulls out 5 foot acrylic cylinder*
Okay...seriously, are you REALLY in a lake on a kayak? 😅
*5 foot acrylic LIGHT SABER!
I feel like they didn't really *need* to be in kayaks on a lake to make this video but I wouldn't want to spoil the fun 👍
no, he’s on a lake in a kayak
he's actually on a Viking longboat
The excitement in these two is just an absolute joy to witness, I love it. Learning++
It also works between layers of air; this is how amateur radio operators can communicate around the world with a 1watt [short wave - SW] AM or SSB radio.
Between layers of water in the ocean; this is how submarines can hide from Sonar.
Your flat LCD screen backlight works on this principle. I saw it demonstrated some 30+ years ago.
Good Job!
"Total Internal Reflection" sounds like a level 10 meditation or yoga technique. Lol
"I happen to bring a larger version of a fiber optic with me" - sounds like what a leisure kayaker would bring
"Fast forward to now: We've got lasers."
OMG. Amazing line.
Deude! I love your curiosity...never stop learning every day!
I love how genuinely giddy with excitement Destin is in this video
Dustin: This is so gonna look like a light saber!
Pulls out a 5’ glow stick... 😂
4:28 I never could visualize wave interference, but it was mind blowing when I saw that wave forming and those sharp points. There has never been a video more enjoyable. More on this please.
dude...i love how amped you are, your giggles got me giggling....im sitting her unemployed, 30 years old, in self isolation in a pandemic, giggling from videos of lasers.
Regular science is too easy. I know lets do it in a swamp in kayaks in the middle of the night...
kinda wouldn't work if it wasn't night :P
"You can tell it's an aspen, because of the way it is"
Destin freaking rocks.
That made me so happy when he said that 😂
That's pretty neat!
Nice video! I learned about snells law and refraction while learning ultrasonic testing (NDT). The sound path through a transducer travels through certain materials and bounces just like the light. It’s easy to calculate the size and depth of flaws/anomalies in materials such as steel.
Request: I would like to see a ultrasonic or phased array NDT video, almost everything we deal with on a daily basis goes through some sort non-destructive testing at some point. People minds will spin if you get into eddy current!
Really cool video man! I have two comments about reflection and angles, feel free to skip if you aren't interested in the technicalities, or do know them.
4:55 So when we talk about angles in optics, we calculate the angle from the normal with respect to the optical boundary, ie, the surface of the lake, or the glass. So, the angle is not under the angle of incidence, but over the critical angle. The angle made by the light beam wrt the normal is called the angle of incidence.
11:27 the beam shouldn't get lighter and lighter as you point the beam up more. When you are pointing the beam up more and more, you are actually decreasing the angle of incidence (wrt normal). Now, at all angles greater than the critical angle, all light reflects, so there shouldn't be a change in the intensity as you keep tilting the laser, until after the angle of incidence, when light starts coming out. Even then, a portion of the light is reflected into the lake, it's just too faint to notice. Thus technically, the light coming out of the lake will increase in intensity as you point the beam more upwards; but this happens only after passing the critical angle.
4:34 just imagine if there were some people at the shore, they would think that some kind of alien stuff would be happening on the water!
Parker Bartnicki well I don’t really know about Huntsville
Me, a normal person: That sounds nice
Destin, an intellectual: That's acoustically pleasing
your comment got stolen and then liked by destin. It´s ok if you cry.
I LOVE how excited you get at stuff!
Thanks so much for the beautiful demonstration.
I would love to know the details behind that interference pattern you got when shining the laser through the acrylic block.
IDEA: could you build a visual analog to antenna tuning using lasers and acrylic? I know it’s not exactly the same, but the end result is similar (EM waves) and maybe there’s a way such an analog could translate into better understanding of the dark art of antenna design.
ALSO another idea: I wonder if the light pipe analog can translate into an analysis of acoustic waves traveling through water pipes?
"Learning things on kayaks with lasers"
I'd watch that show
Umm.... I think you just did...
OH IT LOOKS SO AWESOME!!
Put your goggles on...
Oh.. Does it look awesome??
😄
I think he had a few beers before the shooting
I found your videos a week ago & I've been on binge since. I love the content!
I love how much fun you guys had doing this :)
Your videos make me so happy every time I watch one of your videos your mood makes me smile
That is so true.
I'm pretty sure this is the first time in history that those objects been together in a boat
ardrone2.0 elite especially in a Kayak
Not in any boat, but in a kayak
I love how excited you get. It just gets me excited about this and this video is so funny with all the giggles and jokes.
Thanks for being here for all of us !
I just gave an exam about this stuff so when I saw this video I was like "well, this would've been useful yesterday"
"I'm gonna quit talkin' and just do stuff." I like that.
maybe its mostly just the visuals, but this is your video with the most rewatches from me. great stuff
Destin can be like this: "Oh, that's acoustically pleasing!"
And this: "Can I light up the whole water?"
In the same video, and I love it.
Your videos make me so happy every time I watch one
:)
omg I just came to the comments to type pretty much the same thing! 😀👍
I love how excited you get. You inspire me
Just Mercy also illuminated my mind. Thanks for mentioning it!
*That's acoustically pleasing*
My new favourite Destin phrase. XD
that should be a subreddit
asmr
I would love to see Destin's take on doing ASMR.
@@paradoxicalbum4489 plz no
@@paradoxicalbum4489 YES! He's into nice sounds and the world traveler thing with binaural audio, that would be awesome :)
Who did you get this kayak from, Mary Poppins??
bahahaha
So one could argue, that Lasers are kinda like... _laminar flow..._ for light.
That explains why Destin loves them so much.
Playing about with an LED torch and running water one night I discovered that the light travels with the water stream. Really fascinating to do this.
The fact that you did all of the acrylic and fiber optic stuff in the boat for absolutely no reason makes this video extra special.
*Destin: What happens if you shine light in water??*
_Water lights up_
*_Destin: (insert surprised pikachu meme)_*
I first watched this video before getting my radio license, but now seeing this again it's a great parallel for how HF propagation works, bouncing its way around the atmosphere
I really enjoy the way you love making your videos. Grettings from Mexico.
@4:27 that standing wave made me gasp out loud, awesome, literally.
Yeah that's awesome, but it's not a standing wawe. The light is just bouncing back and forth between the two surfaces
"The light is just bouncing back and forth between the two surfaces"
which creates a standing wave.
yeah, it really is a standing wave. exactly like what you would get if you create a constant source of wave energy in an enclosed circle.
It isn't a perfect standing wave because the bottom antinodes aren't as crisp as the antinodes on top. Presumably because it isn't total internal reflection, some light is escaping through.
@@thomasneal9291 A standing wawe is when two wawes with the same wawelenght, traveling in opposite directions with the same speed interfere. This creates a wawe that has stationary nodes.
(What circle?)
@@thomasneal9291 Btw i'm not that involved in the topic but i havent really heard of standing wawes of light, and i imagine they would be extremely hard to create
Shoutout to your buddy instantly saying "put your goggles on".
So are the goggles just for when you or someone accidentally points the lazer into someone's eyes?
@@ishab.6798 Why are you asking me, idiot?
They're to protect your eyes from the laser light. You don't have to point it into your eyes, the whole video is about _reflection._
Come on dude.
@@Asdayasman Could've done a friendlier approach. Why so rude?
@@Asdayasman You seem like a fun person lol
hmm yea bit rude but makes sense. Thanks for the answer anyway
11:15 is the coolest shot in the bunch imo. perfectly demonstrates the edge.
This is one of those videos that i just keep coming back to. It's just two dudes messing around with things that are so complex and interesting yet somehow also something we experience all the time.
It's awesome seeing how excited Destin gets by things that 'appear' to be simple phenomena to most people, that are actually something complex and amazing. And then he proceeds to blow our minds with his near-magic ability to explain things in multiple levels of analysis. Thanks for making us smarter every day! Your attitude towards experimentation is infectious and brings back the nostalgia of childhood curiosity.