The Absurdity of Detecting Gravitational Waves Quantum Computing Expert Explains 3 months ago   09:07

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)

Comments 7556 Comments

Dragon Energy
pretty much pseudoscience.
Sundararajan N
your equipmemts wil also stretch.
Marc Roy
Detecting all the black holes in the universe all the time, do I ever like the sound of that. I hope I can live to see it.
Thetruthwillblowyou away
Hi guys :) READ THE ENTIRE TEXT. It is short but you will learn a lot of things :) They are clarified in it :)

> What are some of the amino acids benefits?
They’re a part of our everyday life: the skin layers (epidermis, dermis, and subcutaneous fat layers), blood vessels (veins, capillaries, and arteries), tissue, muscle…
Hmm, what is a tissue?

>< The body contains several different types of cells, such as blood cells, nerve cells, and muscle cells.

When cells of the same type “hang together” so to speak, and perform the same function, a tissue is formed.

> Cells have many parts, each with a different function. Some of these parts, called organelles, are specialized structures that perform certain tasks within the cell.
You can think of cells as puzzle pieces. Each puzzle piece is the smallest working part of a puzzle, and when all the pieces come together, they form a big picture(our body). The puzzle(our body) contains around 30 trillion pieces!

Organelle means a small organ.
Now try to imagine the cell and all of its organelles and now think about the universe. They really resemble each other. Just type brain cell and the universe  You will be astonished! Now, lets continue :

- > Atoms, molecules, cells, tissues, organs, and organ systems are the body’s building blocks. Getting to know these most basic parts to see how their functions affect the rest of the parts of the body is a good idea.

Amino acids work in a two-step process.
- Peptides and
- polypeptides are developed because of amino acids.

The end result is that from amino acids and proteins the building blocks of life are formed.
Our human body is responsible for the production of between 10 of the 20 amino acids.

> Do we store amino acids similar to fat and starch storage?
No, we must get these in foods each and every day

> What are the essential amino acids for the human body?
Phenylalanine, tryptophan, and valine — are the essential amino acids for humans.

The essential amino acids cannot be synthesized by the body; instead, they must be ingested through food.
Amino acids. They make up 75% of the human body. They are essential to nearly every bodily function.

Every chemical reaction that takes place in your body depends on them and the proteins that they build.

Enzymes are proteins that act as > catalysts within living cells.

Catalysts increase the rate at which > chemical reactions occur without being consumed or permanently altered themselves.

> A chemical reaction is a process that converts one or more substances (known as reagents, reactants, or substrates) to another type of substance (the product). As a catalyst, an enzyme can facilitate the same chemical reaction over and over again.
Wanna learn more ? :) Now do you wanna learn about the universe? :)
Maybe easier to have 2 4 km long iron rods and measure with electric currents :P

Anyway, so our equipment is good enough to see those "huge waves". Maybe if we enhance resolution, we find a whole array of alien communications with a message saying "Welcome you have reached the minimum technologic requirements to start to communicate with the galactic wikipedia :P
Walrus Trent
It looks like an awful lot of hypotheses for a nearly unobservable effect... science is really stretched very thin here.
The Happy Wanderer
I don't think I understand anything that was said in this video lol
Keene Tiedemann
The title says it all- don’t bother watching the video 😂
Steve White
Seems like this would be a better laboratory to have in a station in outer space. Good thing Space X is starting to make space travel at such low cost.
rakhi mondal
This is a Bengali.....
Loved it
Ahmet aa
what a nonsense. megawatt laser continuously working to detect a wave. i laughed too long maybe it detected that too, sorry
Louis Morge
Really interesting episode, but it's too bad that you never speak about all the process of the signal (using Wavelet Transform and/or Adaptative Filter) which is very complex. There is a very good conference (in French) by Yves Meyer which trying to explain that. It's a really important part that need to be explain too ...
Connor Brennan
hes tryna tell us this isn't alien technology while wearing glasses like that. okay.
Tom B
Yeap, that what's a hardcore geek physicist is like. We do try to fake being normal most times thought.
Joshua Schmidlkofer
Stephen Crothers has great talks on Black Holes, LIGO, and other topics.
Eric Hamilton
It's a total fraud, gravitational waves have not been detected.
phoenix na
am i the only one who cant stop focusing on the guys crinkled shirt
SUBSCRIBE TO ME 4 no reson!
Mystery guitar man
Arty Quantum
And thats how you rip the world of the most needed FOOD, to spend on something as pointless as measuring gravitational wave. What good to humanity will it do in the present or in any Future, near or Far.
Thank you for your work, smart people.
Add Reply

Quantum Computing Expert Explains The Absurdity of Detecting Gravitational Waves 3 months ago   19:27

WIRED has challenged IBM's Dr. Talia Gershon (Senior Manager, Quantum Research) to explain quantum computing to 5 different people; a child, teen, a college student, a grad student and a professional.

Still haven’t subscribed to WIRED on YouTube? ►►

WIRED is where tomorrow is realized. Through thought-provoking stories and videos, WIRED explores the future of business, innovation, and culture.

Quantum Computing Expert Explains One Concept in 5 Levels of Difficulty | WIRED