The Absurdity of Detecting Gravitational Waves

  • Опубликовано:  4 месяца назад
  • A head-vaporizing laser with a perfect wavelength detecting sub-proton space-time ripples.
    Huge thanks to Prof Rana Adhikari and LIGO:
    Here's how he felt when he learned about the first ever detection:

    Thanks to Patreon supporters:
    Nathan Hansen, Donal Botkin, Tony Fadell, Saeed Alghamdi, Zach Mueller, Ron Neal
    Support Veritasium on Patreon:

    A lot of videos have covered the general overview of the discovery of gravitational waves, what they are, the history of the search, when they were found but I wanted to delve into the absurd science that made the detection possible.

    When scientists want one megawatt of laser power, it's not just for fun (though I'm sure it's that too), it's because the fluctuations in the number of photons is proportional to their square root, making more powerful beams less noisy (as a fraction of their total). The smoothest mirrors were created not for aesthetic joy but because when you're trying to measure wiggles that are a fraction the width of a proton, a rough mirror surface simply won't do.

    Filmed by Daniel Joseph Files

    Music by Kevin MacLeod, "Black Vortex" (appropriately named)

    Music licensed from Epidemic Sound "Observations 2" (also appropriately named)
  • КатегорииОбразование
  • Длительность: 9:7
  • Тэги для этого Видео:  veritasium  science  physics  ligo  gravitational waves  wave  interferometer  black hole  black holes  interference  gravitational wave  spacetime  laser  detection  detecting  absurdity  detector  gravity  einstein  general theory of relativity  waves  

Комментарии: 4 309

  • Ray Raymond
    Ray Raymond 16 часов назад

    If you believe this crap you are a moron

  • JBC
    JBC 1 день назад


  • GoodISnipr
    GoodISnipr 1 день назад

    Ok, now I'm not a FE'r but I have to question this:
    A 4km long tube that measures a laser's travel time, must mean that the tube is in fact "straight".

    So how far down into the soil/sand/whatever did the constructors have to dig to place the center of the pipe if the ends of the pipe are each at ground level?

  • ktaika Matika
    ktaika Matika 1 день назад

    Detection of gravitational waves and dark matter along with technological singularity sound like great deal of shitty pseudoscience to me. "Quickly, build us a machine that does not make mistakes and takes everything into account!"

  • Fleksimir
    Fleksimir 2 дня назад

    Exposure to a megawatt of energy for a fraction of a second cannot vaporize anything close in size to a human being. To turn 1 kg of water at 40°C into vapor at atmospheric pressure takes about 2.5MJ of energy, so likely more than 2 minutes for a living human body to be left completely dry.

  • Chad Hurley
    Chad Hurley 3 дня назад

    The LIGO facility thought that they had detected gravity but later they found out that someone had farted in the bathroom.

  • sotsx
    sotsx 4 дня назад


  • Zes
    Zes 5 дней назад

    no such thing as awe inpx energy, no such thing as simple enough to tx, can tell anyx. idts

  • NinjaOnANinja
    NinjaOnANinja 6 дней назад

    That is the precision I use when I am pleasing my ladies B ]

  • Orgil The Observant
    Orgil The Observant 7 дней назад

    I am so excited about the future since we haven't discovered the majority of all things. Like Newton said, great scientists are usually just little boys playing on the seaside picking up a pebble or two while the vast ocean lies undiscovered. I hope to make a contribution towards our understanding of the universe at some point too. You Derek, definitely make a good contribution my man. Thank you for these videos.

  • Mark Balunis
    Mark Balunis 7 дней назад

    Nice, I dug this.

  • dorgesh
    dorgesh 7 дней назад

    please tell me that they didnt make their measurements in inches

  • Don't Know
    Don't Know 8 дней назад

    DAMN!!! People are way too smart...!!! & i am extremely DUMB...!!!

  • Don't Know
    Don't Know 8 дней назад

    Thats right!!! this whole thing is bogus... shut it down...!!!

  • James Simpson
    James Simpson 8 дней назад

    "This whole thing is bogus! Shut it down!"

    What a guy...

  • Myrtena
    Myrtena 8 дней назад

    If the light gets streched, doesnt it go faster than light in the time of the expansion ?

  • Cuhail Efendi
    Cuhail Efendi 9 дней назад

    i Understand Everything.

  • AZOffRoadster
    AZOffRoadster 10 дней назад

    I wonder if LIGO detected the cave in of the tunnel housing the nuclear waste nearby?

  • Blade Mercy
    Blade Mercy 10 дней назад

    so, what's the purpose? to prove a theory?

  • levhart
    levhart 11 дней назад

    he looks like a fakin Morpheus!

  • kdmc40
    kdmc40 12 дней назад

    If I wanted to measure gravitational waves I'd just observe the moon. As it orbits the earth it creats a gravitational wave which can drag the entire oceans all over the place. No fancy equipment needed, just a pair of wellies, LoL 😂

  • kdmc40
    kdmc40 12 дней назад

    Heres the way I see it. Firstly, pretend theres only two objects in the universe. No matter how far apart they are theres going to be a gravitational connection. Otherwise the gravitational calculation between the two bodies would at some point be zero, it never is. Now take 1 black hole, the gravitational effect goes on for ever but its constant, meaning gravity does not have a frequency. Now take 2 black holes in relative close proximity which are in orbit around one another and suddenly the gravitational effect has a frequency. Its the frequency you are trying to detect. What I cant understand about all this is how could gravitational waves not be there! The reason they are difficult to detect is the universe is full of interacting gravity fields and the distance at which the gravitational waves were created!

  • Zyroos félix
    Zyroos félix 13 дней назад


  • Meelek Edits
    Meelek Edits 13 дней назад

    This sounds like a big waste of money

  • Hans
    Hans 13 дней назад

    The dude with the glasses reminded me if Kumar (from the movie "Harold & Kumar") became a physicist.

  • Peter 24
    Peter 24 13 дней назад

    So , the most logical step is to ask : Why did they want to detect gravitational waves in the first place , i mean , for what practical purpose ? Or this is just a money washing machine ?

  • erikig
    erikig 14 дней назад

    Rana Adhikari looks like the scientist you have to drag out of the bar to save the world at the end of a sci-fi movie when the pencil necked number cruncher have failed

  • Sameopet
    Sameopet 15 дней назад

    Humans are amazing

  • MyDick Burns
    MyDick Burns 15 дней назад

    Meaning the earth don't spin!

  • David Hutchinson
    David Hutchinson 15 дней назад

    How do they know the gravity came from two black holes?Is that just a hypothesis of what could create such massive energy? I mean, how do they know that the black hole thing was specifically what caused the disturbance?

  • Mr. Swordfish
    Mr. Swordfish 15 дней назад

    It looks like they took a roll of aluminum foil and sealed it around the pipes of the laser lol

  • blackgriffinxx
    blackgriffinxx 16 дней назад

    nature is like dale from king of the hills It just crazy and stupid by smart as a fox

  • Tristan Cooper
    Tristan Cooper 16 дней назад

    1/10,000th* of the diameter of a proton over

    Both detector establishments detected something simultaneously.......something, not necessarily gravity waves.

    * ( At 1:55 he cites 1/10,000 the width of a proton; at 7:20 it's changed to 1/1000th the width of a proton )

  • ashwadhwani
    ashwadhwani 17 дней назад

    Bs about bs

  • Ruslan B
    Ruslan B 18 дней назад

    what if the signal came not from space but from earth center? I guess both USA detectors will show gravitation waves simultaneously from earth center.... and the source of the wave is under the question black hole or earth center.

  • Carter Barnett
    Carter Barnett 18 дней назад

    I'm sure that there would be hundreds of problems with my idea, but theoretically, couldn't we build that facility in space once we have the capabilities to limit noise and have a much better vacuum?

  • Mark
    Mark 19 дней назад

    God he's beautiful

  • simon p
    simon p 19 дней назад

    Jesus iron your shirt

  • Nenad Bogoevski
    Nenad Bogoevski 20 дней назад

    4:45 lol

  • Ima Tumor
    Ima Tumor 21 день назад

    This is pretty intense science. I wanna see the 1 megawatt laser vaporize a head. Use an Arkansas Death Row inmate...... it would be quick(.000000000001) seconds

  • User 568701996
    User 568701996 21 день назад

    How did someone managed get Govt grants on this research.
    1 MW Laser plant?

  • Moonlight Gaming
    Moonlight Gaming 22 дня назад

    Talk English!!

  • ericsbuds
    ericsbuds 22 дня назад

    how long do they run the laser? that is a lot of electricity! we need something better than fossil fuels :(

  • ericsbuds
    ericsbuds 22 дня назад

    freakin amazing. we built two of them far apart just to compare the results for local effects.

  • Winterturtle
    Winterturtle 22 дня назад

    You should have mentioned the fact that the mirrors bounce the light back along the arms 280 times essentially making it 1120 km long

  • BMan18
    BMan18 22 дня назад

    Disappointed. No control, no way to confirm the validity.

  • R k
    R k 23 дня назад

    Rana Adhikari is from Nepal not India lol

  • Jesse Glanville
    Jesse Glanville 23 дня назад

    is this serious? wtf is going on? we give these people money to come to conclusions of nonsense? I can make stuff up for free!

  • Dario Cangialosi
    Dario Cangialosi 25 дней назад

    ...and at the end of the video you may wonder whether to believe it or not, because you cannot do quite anything else than just... believing...!

  • Mulakush
    Mulakush 25 дней назад

    It is amazing how magical the technique of interference is. It has been used to make large scientific advances. Examples:
    - Proving the wave nature of light,
    - Proving the wave nature of electron and other particles,
    - Proving that there was no 'ether' through which light travels.
    - And now this gravitational wave detection experiment.
    I am sure there are others I do not know about.
    I would like Versatium to make a video about this if possible.

  • Truls Henriksson
    Truls Henriksson 26 дней назад

    When a professor is introduced with a clip of himself doing a bunch of weird noises, that's when I get really interested.

  • M3rc1fu7Mast3r
    M3rc1fu7Mast3r 26 дней назад

    What's the purpose of the sunglasses you guys wear? If the laser is powerful enough to vaporize you, what good will the sunglasses do?

  • Michael Thompson
    Michael Thompson 26 дней назад

    This presents me with a question. Probably more a thinking exercise.
    So if I understand correctly, Einstein's theory of special relativity tries to explain how gravity stretches space and time. does that mean that we, on our earth, are living in this state of stretches space and time whereas outside any gravitational pull would be some sort of default space / time stretch?

    • nightjarflying
      nightjarflying 20 дней назад

      "Quite interesting" suggests to me you are a Brit - same as myself. Read up on Lorentz - I consider him to be a match to Einstein & Feynman

    • Michael Thompson
      Michael Thompson 20 дней назад

      of course, the answer is in the name hahaha.
      Excellent, thank you very much for your reply, I found it quite interesting.

    • nightjarflying
      nightjarflying 20 дней назад

      @Michael Thompson Einstein's first thought experiment showed that you [the observer] moving in an elevator shaft is equivalent to not moving [relative to that shaft], but being in a gravity field instead. By "default space/time stretch" I suppose you mean a region of 'flat' space/time, BUT the 'curve' [or stretch if you like] of a particular point in space/time depends on your velocity as well as the gravitational field at that point - two observers at that point would experience a different 'stretch' [or curve] of space/time if their velocities are different. There is no absolute "default", hence the term 'relative' or 'relativity'. I hope that helps. Look up Hendrik Lorentz, the Dutch physicist, & his Lorentz Transformations - his insights paved the way for Einstein's Relativity.

  • Robert Thomas
    Robert Thomas 27 дней назад

    Another boondoggle

  • jody mondor
    jody mondor 27 дней назад

    you can't measure time of a field that is instantaneous.

  • Zach Washington
    Zach Washington 28 дней назад

    Haha I work on this at Caltech. Awesome stuff. Great vid

  • Ryon Hovey
    Ryon Hovey 28 дней назад

    "This whole thing in bogus! SHUT IT DOWN!"

  • Jimmy Wang
    Jimmy Wang 28 дней назад


  • xViRuSx
    xViRuSx 28 дней назад

    Alright now what can we do with it?

  • JohnnyM
    JohnnyM 29 дней назад

    Black holes do not exist

  • Wake UpMofo'ers
    Wake UpMofo'ers 29 дней назад

    batshit crazy,  who wants to star a lab together,  we just might need  10 to the 18 billion doll$,  lets do it !

  • David Dalmazzo
    David Dalmazzo 29 дней назад

    awesome! awesome!

  • Kaeben
    Kaeben 1 месяц назад

    So... why is it so absurd?

  • Noeraldin Kabam
    Noeraldin Kabam 1 месяц назад

    First aid kit: In case the laser vaporized your head.

  • Jack Wright
    Jack Wright 1 месяц назад

    I call troll on Isaiah.

  • TheTomBevis
    TheTomBevis 1 месяц назад

    Just give it another 50 years. We may have gravity-wave detectors in our cell phones.

  • Isaac Kotlicky
    Isaac Kotlicky 1 месяц назад

    what I find interesting is that this is just an upscaled version of the Michelson-Morely experiment used to disprove the existence of aether, and a billion times more technically advanced to minimize noise.

  • aMulliganStew
    aMulliganStew 1 месяц назад

    "If you've done six impossible things this morning, why not top it off with breakfast at Milliways, The Restaurant at the End of the Universe."

  • deisisase
    deisisase 1 месяц назад

    What would happen if that black hole merger happened 10 light-years away?

  • YoyoMagic
    YoyoMagic 1 месяц назад

    You're suggesting that the big bang was the cause of two black holes colliding. That is pure speculation. And you call yourself a scientist.

  • Дмитрий Шум
    Дмитрий Шум 1 месяц назад

    crazy Money to nowhere

  • Vincent Car
    Vincent Car 1 месяц назад

    How can you not like this video? This is the kind of stuff that keeps me optimistic about mankind, absolutely amazing

  • Allen Pellerin
    Allen Pellerin 1 месяц назад

    Oh I understand now. And to think I thought scientists were only lying to keep their jobs and budgets for another 5 years. Truly the king has no Clothes!! And for my next trick I will pull a black hole out of my @SS.

  • Itzal'Archives
    Itzal'Archives 1 месяц назад

    After watching 3 times i finally understand what they were talking about. Did you guys get it on the first try?

  • Giorgio's adventures in Pripyat with V. Putin

    Fookin' laser beams

  • FodderBoi
    FodderBoi 1 месяц назад

    More impressive than the science: How did they fund such a huge experiment and how do they constantly use so much power and pay for it?

  • Darker Sandman
    Darker Sandman 1 месяц назад

    whait? ive heard gravity bends light around mass, but now it stretches it..would that just change the frequency?

  • Steph G
    Steph G 1 месяц назад

    A true scientist's shirt. Never seen an iron in its life.

  • Michael Reilly
    Michael Reilly 1 месяц назад

    1MW of CW single-frequency 1064nm laser light doesn't sound right. This would be a remarkable feat. I'm sure the average laser power in the arms is only on the order of 100s of milliwatts, it may be a pulsed laser system?

  • A Ginger Heathen
    A Ginger Heathen 1 месяц назад

    I wonder if this could be used to detect warp engines.

  • sheppy001
    sheppy001 1 месяц назад

    All I got from that was that they built a big fancy machine. Dunno what it does though

  • Compuguy123 - Ghetto Mods/Gameplay
    Compuguy123 - Ghetto Mods/Gameplay 1 месяц назад

    That's a pretty big Michelson Morley Experiment

  • AllisterCaine
    AllisterCaine 1 месяц назад

    I would have asked him what the sunglasses are for if after all the laser would vaporize him anyway if something went wrong.

  • Kel Duck
    Kel Duck 1 месяц назад

    Seems to me they need to add a third vertical arm although drilling 4 kms down will be problematic.

  • hydragirium
    hydragirium 1 месяц назад

    O "absurdo" da detecção das Ondas Gravitacionais.

  • Douglas Weatherford
    Douglas Weatherford 1 месяц назад

    Its sorta like not wanting to know how hot dogs are made, it takes all the awe or mystery out of it and makes it tedious and technical

  • Erik Tempelman
    Erik Tempelman 1 месяц назад

    Astoundingly absurd indeed. Thanks for making and sharing: I had NO idea that the detectors are this complex, almost rivalling the LHC.

  • Pi Van
    Pi Van 1 месяц назад

    isn't the time stretched as well?

  • Richard Bergin
    Richard Bergin 1 месяц назад

    makes me wonder whether they really detected anything. We seem a little too sure of ourselves sometimes.

  • David Luckett
    David Luckett 1 месяц назад

    If you are expecting a tiny shift in tens of thousands of a billionths then you will get some kind of result simply by expecting it. Does not prove gravitational waves.

    • David Luckett
      David Luckett 1 месяц назад

      I believe reality is sort of like Superposition I mean where is the proof If a Tree falls in the woods but no one is there does it make a noise kinda of thing? If you observe it, of course you hear a noise. If you put a camera there again you hear a noise. But if there were no observable or mechanical means does it make a noise now that is the question? Testing for gravitational waves is sort of like the double slit experiment of an electron. Same thing with such a very infinitesimal result researchers could pretty much believe in a result that they themselves intended to believe in thereby justifying additional funding to keep the research going it is very laughable really. Reality such as Time does not exist it exists in your mind.

    • Vladislav Dracula
      Vladislav Dracula 1 месяц назад

      What do you mean?

  • David Luckett
    David Luckett 1 месяц назад

    At least the guy was Honest it is Bogus but hey you get the funding for nonsense and what an easy life pays good!

  • drjeopyl
    drjeopyl 1 месяц назад

    Yo momma so fat, when she turns her car Ligo thought it was real.

  • MrInconspicuous
    MrInconspicuous 1 месяц назад

    5:36 quantum mechanics in a nutshell. EVERYBODY SHOULD LEARN UNIFIED FIELD THEORY and then come back and figure out what happened. Quantum mechanics and relativity will never explain the world as it is. Everyone should stop trying to quantify fields, because that's literally just slowing us down. Photons and gravitons and neutrinos don't exist. Really? Attributing light to a unit and then calling it massless doesnt work? Exactly. I wonder when humanity as a whole will understand real science.

  • yolech
    yolech 1 месяц назад

    It took me way too long to realize they weren't wearing sunglasses just to look cool.

  • Rom Hol
    Rom Hol 1 месяц назад

    This video answered so many questions I had. Thank you very very much..

  • Jack EMac
    Jack EMac 1 месяц назад

    Pause at 3:02

  • Noah Hornberger
    Noah Hornberger 1 месяц назад

    is the space stretching (can complete void even change shape by definition?) or is light changing speed based on interference from a very strange wave? Are we willing to look at the fact that light might not be totally stable, but has something that can change it and we are only beginning to have instruments strong enough to detect the wobble in the speed of light? That seems way easier to conceptually conclude than 'nothing' changing shape. Because what is defining the space as it's current space? Nothing. No transformation can occur in space, unless that space is not a space but a dimension of some other figure. And space is not a dimension, it is empty, or else no matter would fit in it. So logically even with all this smart stuff I think you guys are looking at it backwards.

  • Danny Britzman
    Danny Britzman 1 месяц назад

    That "huh. I feel smarter" moment

  • Getting Better at Music
    Getting Better at Music 1 месяц назад

    3:40 guy blown away by the level of understanding of the person interviewing him. Cool.