The Absurdity of Detecting Gravitational Waves
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- Опубликовано: 4 янв 2017
- A head-vaporizing laser with a perfect wavelength detecting sub-proton space-time ripples.
Huge thanks to Prof Rana Adhikari and LIGO: ligo.org
Here's how he felt when he learned about the first ever detection: • How Scientists Reacted...
Thanks to Patreon supporters:
Nathan Hansen, Donal Botkin, Tony Fadell, Saeed Alghamdi, Zach Mueller, Ron Neal
Support Veritasium on Patreon: 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, www.incompetech.com "Black Vortex" (appropriately named)
Music licensed from Epidemic Sound epidemicsound.com "Observations 2" (also appropriately named)
"The laser will evaporate your head instantly."
"Oh, OK. Let me put on my goggles." B)
Appropriate goggles emoji is appropriate.
don't use the cheap ones :)
its for potential stray light
"MY EYES! THE GOGGLES DO NOTHING!"
i warned you .!.
5:17 so not only are football fields a unit of length in America, footballs is also a unit of volume.
THIS IS AMERICA
@@chromiyum6849 If it was really America, he would have used cubic hamburgers.
Unacceptable, only olympic swimmingpools is approved as an american unit of volume. Still better than british, the last few years BBC insisted on using dinosaurs as a unit for everything, and just like other british products it doesnt work.
@@pflaffik I'm sorry, but that is absolute nonsense. The British have long used unladen swallows to perform various distance/time equations and not, my good Sir, dinosaurs as you so inaccurately implied. Now then. Good DAY!
EggyRepublic - I’m surprised he didn’t use the Australian unit of volume which is Sydney Harbours of water, given his Australian roots.
Kudos for getting a "I wish more people would ask that question" from a leading scientist in his field. That must be the best compliment ever for a layman (sorry I don't know your physics credentials lol)
He has a PhD
That's a high school level question smartass .
@@alexbartley3610 millions of people have a profile picture with them and their partner. It’s a normal thing. And it can be considered advertising your sexual preference.
This Comment section wack
@@MS69CHRIS fr
When being hit by that laser, you cease being biology and become physics.
Damn that hits hardddd
And in the end philosophy.
@@untergehermuc You need a much bigger LASER for that transition
all biology is is physics
@@micahhunter5452 Well yeah, technically everything is physics.
“A megawatt will vaporize your head instantly” Good thing they have a first aid kit.
I don't think betadine and a bandaid is going to help...
I couldn't resist laughing man, you killed it
Red sus
Theres a wonderful (read, eye-popping) CGI effect in the first series of The Expanse, where a man's head is 'disappeared' instantly in space by a hi=speed traveling chunk of debris. I was reminded of that when he described this.
Meh... I'll be impressed once they start using 1.21 gigawatts ...
I love scientists who don't care to iron their shirts even for an interview .
For the way he speaked initially it appeared like he wasnt really all that thrilled by the interview, it's posible that this isnt his first interview and most people can barely understand what he is talking about so why even matter, his question about the infrared light wave lenght being bigger than the distortion caused by the gravitational wave surprised him for the best, you can see how lively he suddenly become
He is not in the demanding position so why bother .
Because he is an typical Indian
Or those that wear whatever suits them. They’re the real scientists
@@bhavikshah1946 I just thought that. Lololol dude my dad is a brown Asian and I was gonna say this. My dad is a giant Filipino and never irons anything lol
The guy explained the most advanced technology i have ever seen in 5 minutes using baby language.
I feel like i am a scientist!
This interview made me think how the science of physics is basically matter trying to understand itself.
*Biologically Organised Matter
bro, science in general is just matter trying to understand matter
@@shrooman768 That's the case mostly when discussing natural science rather than, let's say, formal science. And in natural science I'd say all branches are ultimately sourced within physics.
Consciousness.
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 crunchers have failed
stop watching movies, they are making you dumb
Going "wubwubwubwubbrrrrrrr LETS DO THIS!" and fires the gigawatt laser at some atoms
Thats oddly specific
I haven't laughed so hard in a long time. An awesome comment!
or to save the other bar customers from slipping so hard on the floor after all the chicks went Niagara
the guy looked so cool with his glasses lol
Issued safety equipment is mandatory
Chris Vellner safety is numba one priority
Rens and his crocs!
Damn I was just about to comment that lol, he kinda reminded me of Morpheus
lmfao, well played Sir.
I really wish this channel was around when I was younger. The way information is presented in your videos makes it much easier to conceptualize and understand. Back in High School we were sat in front of a book and told to read it. We didn't care, we had a million other things to think about besides reading a bland book. I can only hope the kids watching these kinds of videos today can see the wonder in what's happening. LIGO is an incredible feat, and I'd heard the name before, but never understood what it really was doing. Thank you!
Fully agree!
5:35 This guy is a mad scientist in the making.
Imagine explaining what you do to your investors
Well, you have to apply for this money, so you need to show pretty solid motivation. There are tons of people competing for research grants and you have to explain why you and not the next person.
send them this video
They would need a time machine.
All you have to do is dream up something so absurd that sounds intelligent that will take forever to prove if provable that you have life long income for basically doing really nothing. That is what this is. If you are the only one that can prove it, you can go hunting ghosts all you like. Gravity is a function of wave energy, nothing more. Gravity is also not a pull force but a push force from within.
In fact, the vague and airy cliches that LIGO must rely upon to explain its particular power to transcend loopholes are no different than dishonesty. Dishonesty is the kernel upon which investment accrete. Hubris lately has been unprecidented.
that white shirt was last ironed in 1988, May 12.
He barely has human interaction. So he's lazy 😂
Did you measure it with gravitational waves?
@EZIO AUDITORE DA FIRENZE What does this have to do with anything? He's billion times smarter than you
@@SirNyanPanda its just a joke why so serious?
So how the frick you got the date may 12 lol
The challenge of removing the interference was crazy. The clouds themselves had a gravitational effect. And the silica threads would resonate, causing unique spikes in the readings. Wild stuff.
I love when Professors, Teachers, Scientists, Experts look like they're at the Beach Party enjoying, but they're knowledgeable as hell.
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.
Future project being guarding us from black holes. Yessir absolute legend
I just love how adhikari face completly iluminated once he mentioned the size of the light wave, it was like he was expecting some idiot that would not really understand what he was talking about (like he has probably have to deal with before) and was just extatic to find someone that also talks his tongue
@@ymbhiojtukburtbuyt568 maybe pr maybe not
Good thing Derek is a PHD in physics
I know that feeling. When I suddenly realize that the person I'm talking to understands and has some knowledge of their own on the subject, it's super exciting. Especially when you're used to explaining a thing every. single. time.
I was going to make the same comment :)
👍
Didn't understood much but mind blowing how motivated humans are to do things that would take unimaginable size and money to build instruments that could have detected these things easily.
Out of all the Veritasium videos I've watched, this is my favorite. Dr. Adhikari's responses were both educational and entertaining.
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.
Did you just said you would kill someone? I am calling the cops
Meh.
I thought the guy was meditating before explaining this.
mmmmmmmmmmmmmm Bp P p
thats when I was Born.
Hahaha..He is Indian guy..thats why.
A lot of those folks do, the intelligent usually have their own morning rituals which is like a form of meditation if you think about it, whether it's sleeping in late or being productive early, everyone has a different circadian rhythm.
Just a fun little rabbit hole that ur welcome to join me in
@@PlubusDomis We,We,
Are creature's of habit s
I gotta have it hahaha 😉
So, if I understood it right: While the light being inside the space when it is stretched is stretched too, new light that is entering the stretched space is actually travelling the difference in distance due to the stretching.
Yes, because the gravitational waves haven't yet stretched the new light. At least, that's what I understood.
I don't know what you understood but it is different from what i understood which makes me feel im understanding the wrong thing.
I understood that they were making the tube 'boggier' to get through... (!) and not much else... As in.. I'm not sure how that then helps them with their comparison..
Yeah, and they measure the difference in time it took the new light to travel the stretche space in reference to the time it should have taken, since the wavelenght is fixed.
But i feel like i dont understand it well enough.
yes, the key being that the gravitational wavelength is VERY long, so while it passes the light goes back and forth in the detector many times.
I always like coming back to some of your older content and looking at it with eyes that have now seen some of the fruits of this research. Would be interesting to do a follow-up on LISA and see some in depth information on how they are looking at transitioning this project to space to be able to detect even more gravitational waves.
A professor who can explain the highly complex to the every day person like me is a treasure.
Oh you are a professor!?
The professor: 1:06
The measure of your understanding is your ability to explain it to others
I was just thinking about the Veritasium audience and our demographics. I wonder at what level does he tell his interviews to explain concepts and what level most of the viewership is comprised? I ain't no professor myself or nothing, but I pick up because I am able to understand the concept at a fundamental level. I had professors, actual professors, that failed to explain much less complex questions as well as these videos do. This channel is so great.
I really liked this man. Is it really just a Michelson Interferometer on a really incredible scale?
Excellent job on this video. Prof Adhikari did a FANTASTIC job as well.
Thanks to RUclipsrs like you and Derek, the scientists doing this kind of incredible work are able to be showcased. I think a lot of personality is cut out (more often than not) when specialists like Rana Adhikari are interviewed by cable media or documentary creators. Showing him in a casual light shows the audience that anyone can be contributing to science if they work towards it hard enough. These kind of honest interviews bring a real human element to the world of science and I'm thankful the world has people like you, Derek, and Rana. Keep being awesome! :)
I like how you said it's just a Michelson interferometer
SmarterEveryDay found you!
gravity doesn't exist
ruclips.net/video/984kY2uNLkI/видео.html
ruclips.net/video/x0EGB_o9TZM/видео.html
ruclips.net/video/0NM5q22j5VI/видео.html
ruclips.net/video/nyDey7QSgg4/видео.html
i dont like him
I love that guy, he’s so smart but so funny and relatable. I wish more people could be like him and our father derick
These people give us hope
Mind expanding info. I did not understand this measuring of gravitational waves till now. Thanks for making it simple enough for me to understand.
3:11 I tell my wife the same thing.
haha
Because it's too small?
Can you measure it?
*Changes size 100 times a second*
She gotta meausre it in milimeters
i clicked the time stamp and the advertisement i got was about consumer cellular saying
“its that easy grandma”
oh god oh no oh no
Hah, Prof. Rana is awesome!
hmmmmmmmmmmmmmmmmmmmmmmmmMMMMMMMMMMMMMM
Also, how he makes those sounds :P
sounded almost like... a frog... which is called rana in spanish, lol
He needs to get a new shirt, too ;)
He's like a Pixar character, lol.
I'm really glad I found this video because I first learned about LIGO in the episode on Black holes from the show Strip the Cosmos. And I had so many questions. So I'm loving this video fir asking those questions
I've watched this entire video 3 times, at month's intervals, .... and it still amazes me. Thanks to everyone involved. It's sooooo cool.
Its funny to me how there are physicists and engineers that know everything about lasers, do everything with lazers, and suddenly they are dealing with cosmology.
Not really. Science tends to be interdisciplinary, but still cool.
Mathematicians and physicists can end up everywhere because how pure their branch is.
jojojorisjhjosef lasers get involved in anything as long as you science hard enough.
Everything is physics. EVERYTHING. Geology is physics. Cosmology is physics. Chemistry is physics. Engineering is physics. Physiology is physics. Photonics is physics.
Being a specialist does not invalidate the cornerstones by which all other disciplines operate.
why do you people have this urge to correct him? all he's saying is that it's interesting, not "incorrect"
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"
ROTFL, that was a good one :D
also some people : earth is flat
Some people are born smart, some people are born stupid. And some of them just don't care what the truth is, but prefer to spout whatever comes to their minds instead. :) There's a person for anything.
and we don't are smarter people if we just believe in them not knowing the why that earth be round
Sphere not round
I watched this five times now. In my opinion, it is one of Veritasium's best. Thanks, Derek!
This guy is genuinely happy that finally someone is asking an intelligent question. You can tell he's used to the regular media and their stupid questions
I Detect a Gravitational Meme is Born 1:06
"Mantra meditation for physicists."
gravitational mmmmmmmmmmmmmmmmmmmmeme
Sandlot Rider À
1:25 The Alpha Centauri vs human hair comparison is killing me.
True 10 mm ≠ 0.1 mm :)
@Progressive Dude same, though it's Pokemon not CoD in my case.
seriously.... makes no sense
@John Loibl u don’t
@@dominic9517 lets say you are measuring a table that is 30 cm long with a measuring tape
Is the the table 30.000001 cm or 29.999999 cm
Now imagine one end of the table is milkway and the other end is alpha santori
Is the distance and hair width longer or one hair width shorter
I'm so glad someone was around to see this, Dave
My mind is blown ! I would love to know how they compensated for everything and how things were toleranced
Humans are amazing.
We are able to detect changes to our very frame of reference *from within that frame of reference.*
That is the surprising part indeed!
Good thing the interviewer asked explicitely how that works, and after a lame joke he clearly explained, well kind of clearly.
@@MisterWillow Hahaha that's so accurate! I also could understand the theory, somewhat, but the practicality is still unclear to me. Basically, I'm not enough acquainted with the field.
I can't wait til they can measure the pixels on the screen of the simulation we're part of.
@@nigglebit thing is, there aint much to understand.. an interaction so strong that had too much energy dispensed.. being it noticeable over our planet system noise. This energy flow wended up stretching spacetime in the direction it came from. simply then we measure two 90 degrees angle lengths using lasers. (called interferometer). which is able to pick on quantum distances being bended in reference to another (if one length is streched more than the other it will take the light from the laser a tiny bit more time causing it to when it comes back to interfere with the other light causing positive and negative patterns of interference seen as the final laser (getting brighter and darker) with different levels of intensity over time), which happened that we were able to measure with clarity.
.
@@johnterpack3940 indeed haha that would be nice and along with that i would also like to know how the universe goes into edit mode by the creator of our simulation
Prof Rana Adhikari is clearly a star. Here's how he felt when he learned of G-wave detection: ruclips.net/video/ViMnGgn87dg/видео.html
Those glasses provide laser protection - the laser in that lab won't vaporize your head but it could burn your retinas.
Kissy kissy.
Veritasium Name should be pronounced as Rana Odhikari ( 'A' is pronounced in Bengali as 'O')
+Veritasium
Next step will be using two slits for studying the diffraction of gravitational waves!!!
I believe the upgrade to 1MW they're implementing right now. The 1064 nm lasers have excellent stability, low noise and they are not huge - this makes them ideal for this purpose. BTW older g-wave interferometers used green lasers (that's why Rana's glasses were green).
Veritasium Hey why are you guys wearing the glasses in there? Some protection?
I'm really glad you did this video.. I was reading about this the other day and I had the exact same question about environmental noise.. I asked on reddit and I kinda got snobby answers.. thanks!
An intriguing glimpse into new possibilities and old ones. Thank you
A megawatt *continuous* laser? That's a helluva beam. I toured the Petawatt laser in Austin but that thing only fires for like a trillionth of a second
It's Okay To Be Smart I love your channel
I thought he said light was discrete, duh.
I want one of those - gonna troll my cat with a 1 megawatt :D
It's Okay To Be Smart the power of the laser itself is much lower but they resonate it in a cavity to build up to 1MW
Gameboygenius www.ligo.caltech.edu/page/ligos-ifo
Seems like 750 kW can be stored in the arms.
I’m always the smartest person in the room when I’m watching Veritasium alone.
Sometimes i feel like the dumbest person in the room when im watching Veritasium alone
@@floreaciprian9742 well you can be both the smartest and the dumbest in the room at once!
@@floreaciprian9742 Schrödingers Intelligence 😆
@@floreaciprian9742 Quantum superposition says you can be both as long as there's no observator in the room
@@floreaciprian9742 It's a 50/50 either I feel extremely dumb or very smort
I have lived a few blocks away from that Caltech building for years and this is first time I get to see what's inside of it.
5:23 thank you @Veritasium for answering the question I came here for. And I love how Prof Rana Adhikari was tickled at you being the first journalist to ask interesting questions. The way you introduced him was so crazy and funny! Now I have another question, were you guys wearing sunnies to protect your eyes from possible laser leakage?
To look cool 😆 😎
That guy's shirt has been affected by some gravitational waves
Reading your comment and laughing after watching such a complex and advanced explanation is kind of like the same feeling as walking into a warm room after hiking through the arctic for one hour
Stiggy Vandsrinskeen
How? And why didn't they find anything?
Stiggy Vandsrinskeen Antropy is the problem my friend.
And there are those who throw candy away and cry why there is a printing mistake on its label.
Miika Mäentaus
Maybe he lives inside a black hole
That professor is like "I don't need to iron my shirt , I need answers "😅
I need to give answers 😂😂
This must mean I am a scientist too
So basically… gravity waves make space-time wiggle a bit and make giant lasers get darker slower when the gravity wave passes over the laser. Did I get that right?
And you need to use one very low wavelength of light so that you can even detect the wiggle because on a higher wavelength, the light won’t interfere enough for it to be detected.
Gosh, I feel like I’m operating on the edge of my IQ here hahaha
opposite wavelengths destroy each other, so when one of the lightwaves stretch they get more or less different, so more or less light survives so they can detect the difference by detecting the brightness of the resulting combined laser stream… probably
@@janmamu8721 The beam splitter actually puts the photons into a superposition (similar to the double slit experiment), and then each photon will interfere with its own waveform. Photons can't interfere with each other, only themselves.
@@Jason9637 thanks!
Ron Drever described this in a lecture I attended in 1976. Thank you Ron.
Aliens have this on their smartphones
Safir WE are the aliens smartphones. Chew on that mere mortal.
And those aliens died colliding with black hole
Thinking the same thing
I have this on my backyard
LMAO
The guy running that place knows so much about what hes doing its amazing. He found the perfect job (for him).
Well he has a phD from MIT....need anything more to say?
@@rapianopenaldo1669 haha your Name
level of expertise is known in how simple someone can explain a complex topic in their domain.
I've always been a fan of the content you and others like you (smartereveryday, vsauce, ect.) make, but recently I've been on a binge of your content. Please never stop helping us learn new things about our world!
That guy is so chill
:P yeah
lol.. The guy is a Nepali
He sounds American
pGpants
indians ask all my friends for nudes, not my favourite
ElectroBarb who is ceo of google? microsoft? Adobe Systems? MasterCard..... see im not pretending we are god... but we are kinda cool not only us but we all on earth are amazing, beautiful peoples ;) accept every person's opinion.. and those who asked for n**es are kinda exceptions.. whom you found every where else too... lets not fight on these some words and enjoy the nature of science and explore through Veritasium
Stuff like this makes "rocket science" look extremely simple.
@@charliebingaman571 exactly. A huge chunk of the technology we use in our daily lives were accidentally discovered/invented because of these 'useless' projects, as they say.
@@charliebingaman571 Better than spending billions on war
@@charliebingaman571 go back to your trash can
Rocket science IS simple. Its like basic Physics. Anyone with a very basic knowledge of calculus can understand most of it. NASA is kinda lame.
@Mario Castillo THE ULTIMATE (AND CLEAR) MATHEMATICAL UNIFICATION (AND PROOF) REGARDING PHYSICS/PHYSICAL EXPERIENCE IS NOW DEMONSTRATED, AS E=MC2 IS F=MA: TIME DILATION ultimately proves (ON BALANCE) that E=mc2 IS F=ma, as ELECTROMAGNETISM/energy is gravity. This NECESSARILY represents, INVOLVES, AND DESCRIBES what is possible/potential AND actual IN BALANCE. (Importantly, balance and completeness go hand in hand.) The stars AND PLANETS are POINTS in the night sky. NOW, A PHOTON may be placed at the center of WHAT IS THE SUN (as A POINT, of course); AS the reduction of SPACE is offset by (or BALANCED with) the speed of light (c); AS E=mc2 IS F=ma; AS ELECTROMAGNETISM/ENERGY IS GRAVITY. Indeed, ultimately and truly, TIME is NECESSARILY possible/potential AND actual IN BALANCE; AS E=MC2 IS F=MA; AS ELECTROMAGNETISM/ENERGY IS GRAVITY. Very importantly, outer "space" involves full inertia; AND it is fully invisible AND black. GREAT. Accordingly, INSTANTANEITY is thus FUNDAMENTAL to what is the FULL and proper UNDERSTANDING of physics/PHYSICAL EXPERIENCE; AS E=mc2 IS F=ma; AS ELECTROMAGNETISM/energy is gravity. It ALL CLEARLY makes perfect sense. Gravity IS ELECTROMAGNETISM/energy. E=mc2 IS F=ma. ELECTROMAGNETISM/ENERGY IS GRAVITY. E=MC2 IS F=MA. GREAT !!! Gravity AND ELECTROMAGNETISM/energy are linked AND BALANCED opposites, AS E=mc2 is F=ma; AS ELECTROMAGNETISM/ENERGY IS GRAVITY. Consider THE MAN who is standing on what is THE EARTH/GROUND. Touch AND feeling BLEND, AS E=mc2 IS F=ma; AS ELECTROMAGNETISM/ENERGY IS GRAVITY. The stars AND PLANETS are POINTS in the night sky. GRAVITATIONAL force/ENERGY IS proportional to (or BALANCED with/as) inertia/INERTIAL RESISTANCE, AS E=mc2 IS F=ma; AS ELECTROMAGNETISM/ENERGY IS GRAVITY. Gravity/acceleration involves BALANCED inertia/INERTIAL RESISTANCE, AS E=mc2 IS F=ma; AS ELECTROMAGNETISM/ENERGY IS GRAVITY. Accordingly, the rotation of WHAT IS THE MOON matches it's revolution. Great. MOREOVER, a given PLANET (including what is THE EARTH) then sweeps out equal areas in equal times consistent WITH/AS F=ma, E=mc2, AND what is perpetual motion; AS ELECTROMAGNETISM/ENERGY IS GRAVITY. Gravity IS ELECTROMAGNETISM/energy. INSTANTANEITY is thus FUNDAMENTAL to what is the FULL and proper UNDERSTANDING of physics/physical experience, AS E=mc2 IS F=ma; AS ELECTROMAGNETISM/ENERGY IS GRAVITY. This NECESSARILY represents, INVOLVES, AND DESCRIBES what is possible/potential AND actual IN BALANCE. Stellar clustering ALSO proves ON BALANCE that E=mc2 IS F=ma, AS ELECTROMAGNETISM/energy is gravity. Objects (including WHAT IS the falling MAN) fall at the SAME RATE (neglecting air resistance, of course), as E=mc2 IS F=ma; AS ELECTROMAGNETISM/ENERGY IS GRAVITY. "Mass"/energy is gravity. ELECTROMAGNETISM/ENERGY IS GRAVITY. E=mc2 IS F=ma. THE DOME of a PERSON'S EYE is ALSO VISIBLE. (Notice the flat AND black space of what is THE EYE.) The stars AND PLANETS are POINTS in the night sky. The sky is blue, AND the Earth is blue. THE EARTH/ground AND THE SUN are E=mc2 AND F=ma IN BALANCE, AS ELECTROMAGNETISM/ENERGY IS UNIVERSALLY PROVEN TO BE GRAVITY in what is a mathematically unified fashion. E=mc2 IS F=ma. The middle distance in/of/AS SPACE AND the full distance in/of/AS SPACE are NECESSARILY linked AND balanced. MAGNIFICENT !!!!!!!!!! INSTANTANEITY IS thus FUNDAMENTAL to what is the FULL and proper UNDERSTANDING of physics/physical experience, AS E=mc2 IS F=ma; AS ELECTROMAGNETISM/ENERGY IS GRAVITY. Gravity IS ELECTROMAGNETISM/energy. It is ALL CLEARLY proven. Again, the stars AND PLANETS are POINTS in the night sky. GREAT. Energy has/involves GRAVITY, AND ENERGY has/involves inertia/INERTIAL RESISTANCE. GRAVITATIONAL force/ENERGY IS proportional to (or BALANCED with/as) inertia/INERTIAL RESISTANCE, AS E=mc2 IS F=ma; AS ELECTROMAGNETISM/ENERGY IS GRAVITY. Gravity/acceleration involves BALANCED inertia/INERTIAL RESISTANCE, AS E=mc2 IS F=ma; AS ELECTROMAGNETISM/ENERGY IS GRAVITY. It is all CLEARLY proven !!!!!!!! TIME is NECESSARILY possible/potential AND actual IN BALANCE, AS E=MC2 IS F=ma; AS ELECTROMAGNETISM/ENERGY IS GRAVITY. Gravity IS ELECTROMAGNETISM/energy. GREAT !!!!!!!! BALANCE and completeness go hand in hand. By Frank DiMeglio
That man is a good communicator... and in his job I would imagine rightfully so!
Very much agree with your sentiment at 8:11, absolutely fantastic that we’re peeling back reality beyond what should even be possible it’s crazy.
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
A direct contact will vaporise you, which isn't always the case
The glasses do nothing!
@@cheemomugdoo6001 I didn't want to be that guy, but actually, there is a chance that a small reflection of the laser could leak somewhere and hit your eyes. Such light would blind you instantly even if you can't actually see it.
Sometimes your water tap accidentally gets a tiny leak. Its like a seat-belt for your eyes.
ITs oNLy a MoDEl!
Prof. Rana Adhikari is SUPER AWESOME! He's obviously an expert in this field, and he's eminently capable of explaining his passion in a way that others who don't have his knowledge can more easily understand. That's a rare talent.
Sir, I hope you teach undergraduates, because you are the sort who can REACH undergraduates and enthuse them about science and physics.
review it after 6 years, it still let me fell excited.
As usual fantastically interesting and very intelligent interview🙏🏼❗️
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
😂😆😁
here is a better video of your brown guy ruclips.net/video/ViMnGgn87dg/видео.html
not gonna lie, they got us in the first half.
I'm sorry I put back the megawatt laser and stop vaporizing people please just stop showing up in the comment section
@JOYJIT ROY k...?
Imagine testing your lasers and then one of them bends weirdly and it turns out that they were affected by two colliding blackholes from over a billion years ago
imagined
My astronomy professor worked on this project. It was super cool to talk to her about.
Rana Adhikari is an excellent communicator. It is remarkable this achievement was completed and the results accepted by the scientific community.
3:39 best nerd bromance moment ever.
Yes. Loved this part😂
5:30 is another one
Hahaha this is so good to see
Still better than Twilight.
The more science Professors I see the more I realize they are the BEST HUMANS AROUND
not really
1:25 The Alpha Centauri vs human hair comparison is killing me.
I grew up literally a couple of miles from ligo in Livingston Louisiana. I thought it was just another building up until last year when I learned it's 1 of 2. That blows my mind because there isn't ANYTHING around here.
I'm just glad that there are people out there that are intelligent enough to figure this out.
Don't you just love hearing smart people talk who are experts in the field?
Yeah, but also in cafes, classrooms, around kitchen tables, anywhere really. Doesn't have to be outdoors.
Yes, yes and yes!
gravity doesn't exist
ruclips.net/video/_HaLr9lztAI/видео.html
ruclips.net/video/uf-AkLoYS3A/видео.html
pvtmiller you do know density doesn’t dictate which direction the objects move right? And the fact that we’re moving downwards already proves gravity...
but where do you find videos , this is not one of them
*video starts
*doesn't understand anything
*keeps watching
*video ends
**feels smart*
Hmm... what part didn't you understand? I'd go so far and say they explained it pretty idiot proof...
glad to know you're all smart to understand every single part of this video😊😊 Smart enough to leave a comment bragging about it
Mp57navy. Wow. .!A true Michael Brown
I've heard of that but not seen it.
but why show less?
I think something very important to acknowledge during explanation is that these gravitational waves are tiny *at this distance from the source*. They were not tiny near the source. They were huge at the source.
this is crazy, the extreme of extreme conditions to even be able to detect the wave,respect to all the scientist that are doing experiments similar or related to LIGO
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)
1:07
I apparently need to use more photons because my uncertainty levels are very high...
ruclips.net/video/984kY2uNLkI/видео.html
ruclips.net/video/x0EGB_o9TZM/видео.html
ruclips.net/video/0NM5q22j5VI/видео.html
ruclips.net/video/nyDey7QSgg4/видео.html
@@jclouds2257 I really cant tell if you are actually an idiot or you are just joking.
Maybe next time try Kryptonite...
The amount of precision involved here makes JWST look like child's play. Absolutely amazing.
This ist the most chilled guy I've ever seen.
What do you call a Fleshlight in Japan?
6:38
Made me laugh!
it's fureshi raitu
Yuo of win Noberu puraizu.
Underrated comment
He even made an appropriate gesture :)
Prof Adhikari reminds me of all the best teachers and professors I ever had
This is just amazing, thank you sooo much!
Having visited LIGO Livingston a few years ago, absolutely incredible.
The host asks great questions and the professor answers very well.
did they really or are u just racist maybe?
dontomaso11 are you kidding?
@@panimbryk I don't know if he's joking, but I think it's safe to say you don't need to take them seriously.
Marc, I agree with you. Very well explained. Lol especially if I could somewhat understand it.
I agree with Marc as well, I might be a little racist. Lol
The physics here is straightforward and non-controversial; it's the astounding level of technical expertise required to actually make this measurement that blows my mind!
I kinda disagree with the first part. As Veritasium points out, naively the detector's should not work because the gravitational wave stretches both the light beam and the arms (how can you measure something stretch with a ruler that also stretches?). So this explanation, which is the one almost universally presented, is wrong. Rana Adhikari comes closer to a plausible explanation by suggesting the fact that the light is moving makes the difference. However, as the curvature of spacetime, gravity is more like acceleration (which is why objects are weightless in free fall), so a full explanation is more subtle still. The best science paper I have seen on this is "Gauge invariance and the detection of gravitational radiation" by David Garfinkle, but it requires some knowledge of general relativity (and the underlying mathematics) to understand it completely.
That's why you have to go beyond the woolly prose and analyze it quantitatively. There is no way around the mathematics.
Jack, you seem like a smart guy, so I have a question for you. What would you call the study of how water reacts? The physics of water? And if an ancient water level shows water isn't affected by gravity over any terrain or distance. And always shows flat and level. How has science shown that the surface of water could bend around a sphere to form our oceans? To the best of my knowledge, water must be contained to pool. Thanks
Water reacts to the bending of space by gravity like everything else: it only appears flat over short distances, but if you look at a globe it's obvious that the oceans are not flat at all, as they follow the net gravitational attraction to the earth's center along with everything else, including us - unless you think that Australians feel like they're upside-down all the time!
a) the study of how water reacts would come under chemisty, what I think you meant to say is the study of how water flows or moves etc... and that would be fluid dynamics. b) water is indeed effected by gravity, and so as Jack said, over short distances (and even over large distances relative to every day human scale) this appears to make water and other fluids form a flat surface. However gravity can only be considered a linear uniform field on these small scales, and once you get to larger scales you need to re-evalute how gravity works, because if you don't you would indeed see water (and people and buildings) falling "down" off of the planet. In reality the Earths gravitational field at any point doesn't pull you or water "down" as down is just a frame of reference. Instead the gravitational fields pull you towards the centre of the Earth. By which logic, when you consider large bodies of water, such as the Pacific, which bend around the curvature of the Earth you can't consider gravity to be working on the entire ocean in one direction, but working on it individually at each point to pull it towards the centre. That said, in a way the water is still filling up a "pool" as you put it, but instead of the surface having to be flat, the surface is at a "level of equal potential". It's easier to explain with diagrams really.
To me it's even more impressive that we even knew to look for them.
I love this chill-ass scientist so much
He's right; it's not alien civilization level of technology...
..it is just as simple as refining and perfecting technology we already have.
We didn't have this technology previously you weren't listening the professor said 20 years ago he would have thought this impossible. Its thoughts like yours that constantly limit scientific discovery.
+james d
I dunno, maybe "eh, it's simple, lets just build that real quick" approach is a good thing, really...
It is impossible to attain 'alien civilization level of technology' as the moment we would ever reach such an instance people are immediately thinking 'oh the aliens might have something better', 'Oh you've learned how to reach 10% the speed of light? Aliens can go 99% of it', 'Oh you've reached light speed? Aliens have learned to manipulate wormholes', 'Oh you've learned how to manipulate wormholes? Aliens have learned how to create them'. It it is a never ending chase, today's technology is alien technology to people 100 years ago and the tech we'll have in 100 years would be alien tech to us.
And since we have never had contact with an alien race, wouldn't it be a trifle presumptive to discuss their scientific prowess?
beaconrider
Alien technology isn't a reality it is a concept.
I used to live in Louisiana, and im so glad my physics teacher in high school made a visit to LIGO Livingston a 50 point extra credit project. It wa really cool to be able to visit a place that made this kind of measurement.
I live in Livingston. I was supposed to go on a field trip years ago, but it got canceled. Sad I never got to go.
@@tpm2637 rip ;_;
Any new updates in this field? You should do another video on this! This is amazing 🤩
Lots of events are now routinely being detected.
And I invite you to look at how some are now using puslars to do same thing at a galactic level.
great video. but I find the image of the earth squeezing quite misleading: the earth, as any rigid body, is completely untouched by the waves, since electromagnetic bonds are hugely overwhelming with respect to GW. What LIGO detects is the stretching in space between mirrors that are completely disconnected from the earth (otherwise their distance won't be impacted by GW)
0:55 Visit the prof
mission passed!
Respect+
Lmao
Lol
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
@Dr Deuteron One thing that has me scratching my head a bit is that at 2.5 miles long the curvature of the earth will cause a drop of something over 40 inches. How do they get the laser beam to bend around that? Or is the tube elevated as it goes?
@@Videot99 It should have you scratching your head because it is theory(blackholes) piled on top of theory(two blackholes) piled on top of theory(two blackholes colliding) and this place is measuring the theory. What he has really created is a scientific BS meter.
@@semperfipar1299 You might want to go and check the difference between a hypothesis and a theory and stop embarrassing yourself.
"Now here's something most people don't think about, which is that gravitational waves stretch space-time."
That's an understatement if I ever heard one. Most people don't even think about gravitational waves OR space-time at all.
"Guys... science is sometimes boring...."
"Yeah but not if we wear sunglasses."
Production Manager: "We wearing sunglasses!!!"
Boom science is cool now.
When you are in an environment with that kind of laser power special anti-laser glasses are required. a single dust particle in the beam could deflect enough light to fry your retinas
The smaller a thing is the bigger the machines you need.
what coincidence because it's the same thing with glasses
that's what she said
Romano Coombs new faith?
congrats, you explained the entire concept of a "zoom" feature?
Don't forget that Earth received a tiny tiny share of a spherical disturbance radius 1.3 billion lightyears!
All I heard was, " ...we have lasers... they will vaporize your head off..."
US gov be like
Thanks for explaining this was having trouble with this but not now
I just turned 70 and am glad I can witness some this phenomenal detector stuff - b4 I die.