Veritasium - 2017-01-05
A head-vaporizing laser with a perfect wavelength detecting sub-proton space-time ripples. Huge thanks to Prof Rana Adhikari and LIGO: http://ligo.org Here's how he felt when he learned about the first ever detection: https://youtu.be/ViMnGgn87dg Thanks to Patreon supporters: Nathan Hansen, Donal Botkin, Tony Fadell, Saeed Alghamdi, Zach Mueller, Ron Neal Support Veritasium on Patreon: http://bit.ly/VePatreon 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, http://www.incompetech.com "Black Vortex" (appropriately named) Music licensed from Epidemic Sound http://epidemicsound.com "Observations 2" (also appropriately named)
Scientists : "We are able to detect gravitational waves from the collision of two black holes 1.3 billion light years away"
Also scientists : "For the last time, the Earth is round"
Of course earth is round...... and hollow
@Lars Alfred Henrik Stahlin both are approximations. Physically, it's fractal down to atomic sizes, while the shape of the equipotential gravitational surface is known to several thousand 'moments' (unclassified): https://earth-info.nga.mil/GandG/wgs84/gravitymod/egm2008/
@DirtyBird760 So not true. Even on just the signal processing side, the development of signal detection in ultra low SNR has helped increase bandwidth across the world, leading to billions in increased productivity. The computational techniques in numerical relativity are phenomenal, and useful in other non-linear problems in engineering. Hardware wise, the ultra narrow band high power laser and a single 40 kg macroscopic quantum system is amazing, and will (or already does) have spin-offs. "creep noise" in silicon fibers has application in earthquake predictions...which could save 10's of billions plus lives.
@Kouga I know plenty of smart scientists who believe completely ridiculous things. Scientists are just humans.
@Duane. A Flat Plane- Bowerscott No, light travels 186 miles per millisecond, in which time gravity bends the path by 1/5000-th of an inch...and effect that is completly swamped by atmospheric gradients and turbulence.
that white shirt was last ironed in 1988, May 12.
i think it's just the material :)
He’s using the shirt to detect laser leakage. If it unwrinkled he knows there’s a problem
may 12 my birthday lol
@Nyan Arthur that joke was not racist to begin with. Joyjit Roy is Bengali and so am I. It's just a bit of self deprecating humour.
@N B Uf, didn't look that way for a foreigner like me
Aliens have this on their smartphones
Mandelbrot? I thought it was a Rorschachach. Small penis OR vagina and anus? Please tell me I’m not the only person that saw it.
hii mr. mandelbrot set
Can confirm, am waiting this on my smartphone
Actually they are as smart as a dog
aliens smart phones arnt detecting gravity waves.
alien children make gravitational waves and parents hang them on their fridges
just a smoking stump lmfaoooo if that guy was any chiller he'd be dead
He's at Cal Tech. He smokes pot.
absolute zero
Honey Badger Offroad you sound so disapproving lmao even if he did, who are you to judge??
Humans are amazing.
We are able to detect changes to our very frame of reference from within that frame of reference.
I would say some humans are amazing.
Err, lol? Literally every measurement is that. Stop trying to sound clever.
@pyropulse
"Literally every measurement is that."
Literally, you are wrong.
We use fixed & standardized measures, defined by National/International organizations.
Unless you are somehow able to measure the length of an elastic object using an elastic measuring tape, while both the tape & the object are oscillating. 🤯
(& my simplified example isn't even close to describing what they actually achieved at LIGO, literally).
@Kat I majored in physics. Your statement was incredibly unclear, so I made fun of it.
@pyropulse
Although I didn't major in Physics (I'm just a plain ol' Engineer), I find Nisarg's statement incredibly accurate.
Being able to take an incredibly accurate measurement while our very instrument is fundamentally part of the system that's being affected by the physical property we are trying to measure, is indeed amazing.
If you, a physicist, think that this statement is ridicule-worthy, well, to each their own I guess. 🙂
Nice minecraft redstone tutorial
SethBling would use armorstands
Wouldn't it be easier to just use commandblocks.
@Kipotuzer TT dont cheat
Communism and statism are rubbish.
humanity's greatest misfortune
Silence commie
i’m stereotyping, but he’s the type of brown dude, with glasses that has hit the highest levels of chill and great to hang around with
I wonder how many trips he went on before he figured all of this out...?
@fitnesspoint2006 yeah... this moment right here... what a dude! https://youtu.be/ViMnGgn87dg?t=93
indians are so cool, they're so nice and down to earth.
N73B60 them too. I’ve worked them as my security and even in high pressure they are chill as all hell. I’ve seen em put people on the ground with a smile. Not my personal security let me clear these up
Indians were into cosmic consciousness centuries ago, you know all that birth, preservation and destruction stuff to go around in another cycle of the same for eternity. He looks like he may have escaped being trapped in that cosmic cycle!!!
Orange crocs and those shades? what a legend
The shades are maybe mandatory in the "laser zone".
@Vallecaucanisimo
There are a whole bunch of lasers in the real-time measurement system that damps external vibrations. There are more lasers to worry about than the one in the tube.
They were standing next to a semi-functional scale model, far from LIGO. They have a very simple policy to protect people from the big beam. When people are working in that building, they shut off the beam. LIGO can't produce good data when there are people or other masses moving near by.
The scale model is used to test ideas before they start working on the real thing. It is functional in the sense that it is comparing laser beams in a vacuum, and there are real sensors being tested. It is not functional in the sense that it can't detect a real gravity wave. They have some other mechanism to move the mirrors do they can test hardware and software.
@Vallecaucanisimo No problem.
Some graduate student once put a laser enclosure back together wrong in a distant university research lab, and bad things happened. So now the safety engineers at universities and national laboratories want everyone to be at least two mistakes away from blindness, death, or dismemberment.
Voice: Kent, wake up!
Kent: Who is this?
Voice: It’s Jesus Kent! Stop playing with yourself!
Kent: It is god.
Ironed white shirt: Exists
Rana Adhikari: Let me introduce you to my friend.....
Her name is Fashion
1:25 The Alpha Centauri vs human hair comparison is killing me.
True 10 mm ≠ 0.1 mm :)
yep.. crazy numbers and scales. My brain couldn't process this info so I went back to playing CoD MW
Rana Adhikari is the prof whose classes you tried your hardest to register for, only to realize that it was already waitlisted at 2.7 femtoseconds. I'd kill to have this guy as a lecturer.
Lol, did a pack of bacteria waitlisted him?
OuterRem that is who designed that project, easy A scientists that went on to secure govt grants
And that is why he doesn’t lecture.
All I heard was, " ...we have lasers... they will vaporize your head off..."
US gov be like
*Dr. Evil has entered chat*
A megawatt won't even rip your head off, it will just vaporise.
So why are we bothering to wear these glasses?
Because they look badass, that's why
I thought the guy was meditating before explaining this.
He was sleeping with his eyes open
They must have accidentally detected my girlfriend falling out of bed.
1/10000th the width of a proton? Wow, that's almost as small as my pp
that is the prob bruh. Yo' "pp" exhibits non locality. That is, it aint even existing 'tween yo' chicken scratchers(legs). fell ma'?
Unexpected self efacing humor. Funny as hell.
You must be British
Oooo self burn. Those are rare.
Should have said almost as big would have been funnier
the guy looked so cool with his glasses lol
his name is pajeet,hes a tech support
scrolled down to write precisely this. cool af
he reminds me of the russian scientist who goes crazy after being alone for so long in the movie Armaggedon
Wrinkles in the time-space continuum caused by gravitational waves turned his perfectly ironed shirt into.that.
Can't be letting the world know you are stoned to the bone while doing science or they might cut your budget.
The more science Professors I see the more I realize they are the BEST HUMANS AROUND
I'm a blue collar type. There must have been extremely skilled construction workers involved in building this. Glad this is happening in my lifetime.
Usually these are assembled by engineers. The construction workers may have been involved in building the actual stretch of building with wiring. The actual pipe that has all the ingenuity requires precise measurements only engineers can build
Like spacecraft (space ships, drones, etc) theres engineers who specialice in working with these massive structures that despite being kilometers Long have to be made with nanometric precision
The technicians are very talented. Lots of work in the machine shop, and the alignment of everything is an epic survey challenge. Then you gotta maintain vacuum, temperature, and electrical stability. Plumbing too, water cooling, cryogenic systems, all without making too many vibrations.
I think I just heard the scariest thing. It’s like nature wants us to stop, but we keep finding ways around it.
That is how the heisenberg uncertainty principle seems. You can't know everything about particles at once. You can never actually know anything precisely, only relatively and with some nonzero degree of uncertainty.
The universe is some kind of medium seemingly designed to baffle our minds. Some kind of jelly that we can't quite grasp.
indian in caltech,
and i was expecting raj.
Raaazzz
Razzzzist
Imagine explaining what you do to your investors
The ignorant loud-mouths are in for a rude awakening if their understanding should ever become of any real consequence.
@Lars Alfred Henrik Stahlin Wow you guys have been trolled hard lol
Stop feeding them already.
@Sérgio Alves lol Yea. This Nathanal Woodruff in particular is either a big troll or dumber than a sack of potatoes.
@MR SLAV, you here!!??
Peter Gibson actually, NASA didn’t build any rockets or space vehicles, they were contracted out to the private sector and the Gov took all the credit.
Part of me wonders how much he was really joking when he said "It doesn't make any sense, this whole thing is bogus, shut it down!"
Till this day, I'm still processing the absolute scale of this bonkers project.
That “50x greater energy released than everything else in the observable Universe” boggles my mind
My mind decided to accept it as BIG and leave it at that. ;>)
Its not possible because it's in the universe, so the universe has to be more
2:09 the mirror is the smoothest ever created
Also him makes video: smoothest object that reflects
2:06 is the smoothest mirror. He made a video on the smoothest thing ever. Not necessarily a mirror.
I’ve been surfing gravitational waves for decades.
That guy's shirt has been affected by some gravitational waves
@Sky Lake Actually space and time are one and space-time is 4 dimensional. That's why we can't "see" it. It's 3 dimensions of space and one dimension of time.
Is that all you see?
Didn't really understand the purpose of this video. I don't think anyone did.
HE'S A BENGALI, INDIAN. WHAT MORE CAN YOU EXPECT ?!! LOL
they hit this personality also
As a man I need just to feel the gravity wave of a beautiful girl, clash of two black holes is not my business
Humans:
Aliens: DIY Gravitational waves detector with 2 eBay laser pointers and a mirror | Easy life hacks
😂😂🤣🤣🙈🙉
If that dude needs someone to iron his shirts I work for a greencard.
Oh it's just the gravitational waves that wrinkled it... no biggie.. now get me that iron please. tsk-tsk
*video starts
*doesn't understand anything
*keeps watching
*video ends
*feels smart
but why show less?
Far away burst of gravity makes big wave.
See big wave by looking close at big, long laser beam.
Need big long laser beam because hard to notice gravity wave.
What do we get from these vision? Not much yet but could help us circumvent potential future natural disasters that come from space. We don't really have the other necessary angles of technology to make great use of viewing gravitational waves, at least I don't think we have anything.
dont forget *Watch another video of the same absurditiy
- Video starts
- Don't* understand anything
@Toy-joda i guess you can understand but its not intuitive is what hes trying to say. Ull have to revisit the vid and think about it. Same for me. But if u got it at one go good for you. Also to understand you need basic knowledge of how interference works.... So yeah a background in atleast undergrad physics?
Thank you, Professor Adhikari, for finally answering this question that has been bugging me since high school. "What does a gravitational wave sound like?" It's now the ring-tone on my work cell. (6:12)
1:14 ok but am I the only one having a elonmuskdolphinmemeflashback here?
Was I in this?
"1 megawatt.. you know.. boom.. won't even rip your head off just a smoking stump" The way he tells this is just so funny to me
When you are a PhD student watching this amazing absurdly incredible accomplishment, and realizing that your simpler, and ultimately more useless research, has dumbass problems you have no idea how to solve.
Its funny that so many smart people cant see how this makes no sense
0:44 every flat earther just cried
This just came out for my A Level paper and I wish I had watched this sooner:(
Im going to explain this tonight while im drunk to someone also drunk just to see what happens :) thx great video
explain it to me because I think it's wrong.
Just few more years of not ironing this guys shirt and it will absorb all of incoming light
Tried so hard to understand..
Gave up.
You lost me at, "hello"
In 1862 Léon Foucault mesured the speed of light with an error of a billionth of a second.... No laser. No electronics. No electricity.
Look at the experiment...
Why does this scientist look like a Hawaiian surfer
This brown Bengali guy is the Coolest scientist I've ever seen, so far.
When i'm heating my food in the microwave 1:08
I got a theoretical degree in physics and I understand nothing
@LeeroySchenckins best comment ever, well today
@lushin burl He was joking, he didnt say a degree in theoretical physics BUT a theoretical degree... meaning "lets make believe" I love the response of someone saying he only has a hypothetical degree, which is like a masters to a doctorate. lol, you guys made my day with the comments!
I got my conjectural degree in Physics in 12 weeks from University of Phoenix. Maybe I get to work as janitor at LIGO?.
Sounds like something an amateur physicist would say. I am one, but I wouldn't say it.
Even I understood it and I'm just a lowly economist.
It's a distress call from Mr. Stark
Hah, Prof. Rana is awesome!
such a chill dude. "This whole thing is bogus! Shut it down!"
Yeah, imagine Cosmos season 2 with Rana Adhikari
Raul Limos are you kidding?! I was about to say how awesome it looked!
Helge Frisenette u r right and wht matters is the work he is doing nt the shirt
1ucasvb yeah wish I had him as a teacher
erikig - 2017-05-12
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
deadeyes - 2020-03-08
@Luis Sierra i like your comment
MelficeN7 - 2020-03-12
@deadeyes Then you're dumb.
CHANGBA DINESH - 2020-03-13
Rana adhikari..isn't he Nepali?
Tee Se - 2020-03-21
@Commandelicious 1 mega watts detect 1021mega watts creates
ricky l - 2020-03-22
HAHAHAHAAA this is the best comment