What Happens to Lasers Underwater? - Smarter Every Day 219

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  • Published on Jun 20, 2019
  • Original Video on 2nd Channel: ruclip.com/video/zh1E3TbBF1Y/video.html
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    ~~~~~~~~~~~~~~~~~~~~~~~~~~~~
    GET SMARTER SECTION
    Snell's Window
    en.wikipedia.org/wiki/Snell%27s_window
    Total Internal Reflection
    en.wikipedia.org/wiki/Total_internal_reflection
    An excellent video by the Engineer Guy about how fiber optic cables work:
    ruclip.com/video/0MwMkBET_5I/video.html
    Index of Refraction:
    en.wikipedia.org/wiki/Refractive_index
    ~~~~~~~~~~~~~~~~~~~~~~~~~~~~
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    Warm Regards,
    Destin
  • Science & TechnologyScience & Technology

Comments • 4 942

  • SmarterEveryDay
    SmarterEveryDay  28 days ago +1068

    I found this link later that night while fishing. twitter.com/smartereveryday

    • etmax1
      etmax1 4 days ago

      In regards to the acrylic rid, It's actually not a fibre optic, but rather an optical fibre :-)

    • joe simamura
      joe simamura 7 days ago

      love u by the way

    • joe simamura
      joe simamura 7 days ago

      pls describe the theory behind it as well. it will be a complete video

    • Professor Eggplant
      Professor Eggplant 13 days ago

      The name of your boat is perception.. That's hilarious.

    • Aadithya Athrey Chandiran
      Aadithya Athrey Chandiran 15 days ago

      This is the science behind optical fibers

  • Deejay JeanP
    Deejay JeanP Hour ago +1

    Your excitement is so contagious! I wish I could go along on these trips once! 😊

  • Dimitry Shitarev
    Dimitry Shitarev Hour ago

    These concepts are on the MCAT. So is laminar flow. Destin is helping me study.

  • Mar Raf
    Mar Raf 5 hours ago

    So did you make the camera? The light pipe camera? (LPC)

  • Idr.Christian David
    Idr.Christian David 6 hours ago

    why the moon so red

  • Emma the FANGIRL
    Emma the FANGIRL 8 hours ago +1

    The majority of people: Woah! That sounds really cool!
    Engineer: Woah! That’s acoustically pleasing!
    😂😂

  • Naseem Shanboor
    Naseem Shanboor 15 hours ago

    dude thats as close as it gets to a light saber so far

  • Dave A
    Dave A Day ago

    The watch he is wearing, what make and model ?

  • Graham Whatmough

    Loved the 'nature walk' reference haha

  • Anne Grießhammer

    I have a RGB mousepad with a fiber that runs around the edges of the pad. After watching this video i took it apart and played with it. Now I understand how that works. Thank you Destin! Also I wonder what happens if you light up a stream of laminar flow?

  • John Sin
    John Sin Day ago

    SmarterEveryDay is secretly the smart older brother of Anklespankin.

  • Garforce II
    Garforce II Day ago

    the slow mo guys have that lens you are talking about, and it makes for epic slow mo shots

  • Bisham Singh
    Bisham Singh 2 days ago

    Can you do a video on how submarines navigate without colliding?

  • Ludvig Bohlin
    Ludvig Bohlin 2 days ago

    Laser goggles?
    You mean *Tony Stark's glasses*

  • Michael Ballou
    Michael Ballou 2 days ago

    You need to combine total internal reflection with your favorite, laminar flow. Laminar water will act as a fiber optic. Cool stuff!

  • Rui Rizzi
    Rui Rizzi 2 days ago

    The childish way that you guys enjoy yourselves and laugh with your stuff on this video is contagious. great!!

  • David David
    David David 2 days ago

    Witchcraft! Dunk them!

  • l-Orbital-I but dont grief

    EYE RAPE.....😲😵😲😵😵😲😵😲😵😲😲😵😲😵😵😲😵😲

  • Alan O
    Alan O 3 days ago +1

    People on shore must have been freakin the heck out!😂😂

  • Chris Jones
    Chris Jones 3 days ago

    Love the safety! One thing he never ever forgets is to be safe! Kudos my friend!

  • y1521t21b5
    y1521t21b5 3 days ago

    5:44-5:47 That giddy boyish excitement elevates these videos a great deal ;-)

  • Andrew Johnson
    Andrew Johnson 3 days ago

    lol that pretty neat

  • Mythical Year Off
    Mythical Year Off 3 days ago

    What I just heard was "I'm on a boat"

  • Mark Vincent Cocjin
    Mark Vincent Cocjin 3 days ago

    I sat through the entire video waiting for the alligator.
    This disappointed me.

  • Prince of Random
    Prince of Random 3 days ago

    4:55 is it cracked? what cause that reflection @@

  • Rigo
    Rigo 3 days ago

    This video made me happy😁

  • tsartomato
    tsartomato 3 days ago

    i wanna play with words i can't pull from my brain in the last episode, which is "let's sneak up on beaver"

  • Nunya Bizness
    Nunya Bizness 3 days ago

    So, how many fish are now blind because you decided to go all Dr. Evil, playing with your fricken lazer beam? At the very least you could have found a snapping turtle or a gar and strapped it to their head.
    Love how you have fun with this stuff! Keep it up!

  • Emil Sørensen
    Emil Sørensen 4 days ago

    Makes me wanna go night-kayaking.

  • I love dogs I have 2

    Proof the earth is round

  • DJ Mahnke
    DJ Mahnke 4 days ago

    Take away: "Milf Oil"

  • Leiki Dragon
    Leiki Dragon 4 days ago

    8:46

  • Leiki Dragon
    Leiki Dragon 4 days ago

    your orb was rolling

  • Arpit Sethi
    Arpit Sethi 4 days ago

    Do not disturb the aquatic life by shooting laser at them at night. It might damage their vision forever.

  • Landyn Powell
    Landyn Powell 4 days ago

    You should make a battle bot

  • Mohammed Monkey Scrotum

    Hay pro tip just dont shine it directly into your eyes & you wont need the F👌GGY glasses fyi

  • Divyaan Dhanak
    Divyaan Dhanak 5 days ago +4

    Those fibers turned red when he was switching the thing off 6:25

    • Michael Evans
      Michael Evans Day ago

      I think thats just a reflection from the recording light on the camera.

  • 888HUSKERS
    888HUSKERS 5 days ago

    Amazing video, I love it :)

  • Dacreepa99 Gaming
    Dacreepa99 Gaming 5 days ago

    anybody else see the laser flip out at 4:13

  • Bob Fischer
    Bob Fischer 5 days ago

    This was an awesome video- acrylic bars and lasers in a kayak at night, with filming equipment. Its adorable seeing an engineer be amazed by TIRf. TIRf has all kinds of amazing properties- laser light is polarized, and so interestingly, with p-polarized incidence, the evanescent e-wave from the surface can "cartwheel" producing elliptical polarization. In microscopy, the fact that the evanescent wave penetration depth can be less than the wavelength of incident light has revolutionized single molecule imaging and tracking, owing to the huge increase in signal to noise. TIRf with immiscible liquids of different refractive indices is another fun thing to try...too bad Destin didn't have a huge drum of vegaetable oil on the kayak....

  • brass tacks
    brass tacks 5 days ago

    this was interesting, but i have an even bigger question. does light act the same way when sunlight hits the earths atmosphere?

  • nlmaster98
    nlmaster98 5 days ago

    Answer: Not much, just slowed down a little.
    Everything else just happens, when the light goes from one optical medium to another. And even then, only if of different optical density.

  • byFiscus
    byFiscus 5 days ago

    7:27 I like the neature walk reference lmao

  • FocusOnBattlefield
    FocusOnBattlefield 5 days ago +3

    "everyone knows that if you point a laser under water at 50 degress to the south the reflection of the moon rocks will go up and make a curve"

    me: yeah of course. wtf

  • Fossil Draws
    Fossil Draws 5 days ago +2

    "There's MILF oil in the water"
    I don't want to know what he actually said.

  • royal neal
    royal neal 6 days ago

    Love the face fuzz

  • Florian dubbeldam
    Florian dubbeldam 6 days ago

    That "good" sounds make me peeing

  • Michael Orlow
    Michael Orlow 6 days ago

    dudes on boats with lasers

  • Shane Forsythe
    Shane Forsythe 6 days ago

    Underwater lasers, amazing.

  • soadown5
    soadown5 6 days ago

    Did he say milf oil?

  • Rob Richards
    Rob Richards 6 days ago

    If this guy can get laid, there's hope for anybody...

  • MIKE JIMENEZ
    MIKE JIMENEZ 6 days ago

    i have a question- does the laser bounce off the water when pointed at the water the way it does when in the water?

  • RC Sutton
    RC Sutton 6 days ago

    That's pretty neat

  • Landyn Powell
    Landyn Powell 6 days ago +1

    Y’all should shoot a baseball at 500 mph

  • To Max
    To Max 7 days ago

    Am I the only one who wants a laser now ???

  • Jarred Gilbert
    Jarred Gilbert 7 days ago

    Never heard of milf oil before

  • I know you're right, but

    2:05 the kayak name is perception..!

  • Alfred du Kon
    Alfred du Kon 7 days ago

    Actually love how giddy this gets you. Great vid

  • meredocu
    meredocu 7 days ago

    how neat is that?

  • Shaun Madden
    Shaun Madden 7 days ago

    Brighter and dimmer.

  • Joe Swank
    Joe Swank 7 days ago

    8:35 acoustically pleasing... do you mean ASMR?

  • Joe Swank
    Joe Swank 7 days ago

    ... it's called refraction

  • Sebastian Thiel-Andersen

    7:19 if you cut some of the Pipe of and stick the laser to the end of it you can make a light saber alike Thing

  • Jason Delgado
    Jason Delgado 7 days ago

    Are they using goggles because the laser is bad for you or?

    • Fire Baller
      Fire Baller 7 days ago

      Sigh* of corse it’s bad for you if it were accidentally aimed at ur eyes you could be temporarily blinded or even permanently blinded

  • Han Solo
    Han Solo 7 days ago

    I wonder if this is why photons appear as a wave

  • Task Force
    Task Force 7 days ago

    Should of named this “Dudes on kayaks with lasers” lol

  • Ryan Tseng
    Ryan Tseng 7 days ago

    The laser goggles make Destin seem so much older 😂

  • Roberto V
    Roberto V 7 days ago

    I’m guessing you’re not in Florida

  • Charlie Nichols
    Charlie Nichols 7 days ago

    "Its a light pipe" hahaha thats awsome

  • jabbar kazmi
    jabbar kazmi 7 days ago

    Dont blind the fish mate
    ...