How Much Does a Shadow Weigh?

Veritasium SLINKY video: http://bit.ly/SGD73o
Veritasium channel... SUBSCRIBE: http://bit.ly/RoMMH7
A great Veritasium episode about using video to teach: http://bit.ly/VOsZVx

Vsauce2 LEANBACK about shadows: http://bit.ly/VOt8rP

Vsauce3 explains how realistic SimCity is... SUBSCRIBE: http://bit.ly/PMThlp

ALL MUSIC BY: http://www.soundcloud.com/JakeChudnow
Jake's YouTube channel: https://www.youtube.com/jakechudnow

Vsauce on Twitter (lots of extra mindblows): http://www.Twitter.com/TweetSauce
Vsauce on Facebook (your chance to blow MY MIND): http://www.Facebook.com/VsauceGaming

Hand shadow book: http://books.google.co.uk/books/about...

Light "pushes" us: http://www.straightdope.com/columns/r...

Solar Sail: http://www.jspec.jaxa.jp/e/activity/i...

solar sail GIF: http://www.jspec.jaxa.jp/e/activity/i...

Venutian Shadows: http://www.digitalsky.org.uk/venus/sh...

Speed of light in different materials: http://cadlab6.mit.edu/2.009.wiki/anc...

sonic boom demonstration: http://demonstrations.wolfram.com/Wav...

Cherenkov radiation: http://profmattstrassler.com/articles...

and: http://en.wikipedia.org/wiki/Cherenko...

Photonic booms in your eyes: http://en.wikipedia.org/wiki/Cosmic_r...

Pushing a lightyear-long object: http://www.physicsforums.com/showthre...

compression / longitudinal waves: http://en.wikipedia.org/wiki/Longitud...

cool site for putting things in perspective (this link is for 1 sq. inch): http://www.bluebulbprojects.com/measu...

Also this is important: http://animalsbeingdicks.com/post/231...

• Category

  Science & Technology

[rubikfan1]

7:28 now all fat people are ganne way them self in the dark lol

[Christoik]

But a distorded slinky has a kind of energy stored and when freefalling it convertes it to "push signals".

If i had a SOLID tube 1 lightyear long that doesn't need to send "push signals" because it is solid (think of the most solid material in the universe) and all the energy required to push that tube, wouldn't the button at the other end of the tube be pushed instantly?

[D Birt]

well he planet earth is solid across the crust for the most part. More solid then a slinky at least and compression waves take time to move though the planet. Thats how we can locate earthquakes

[Mrplzdont4get]

No matter how solid an object can be, there is still a marginally small distance between its particles, and these particles can push others only by means of repulsion between electrons, a field force. This force is not strong enough to propel the other particle at a speed higher than, well, the speed of sound.

[Matthew Coleman]

Who else always stays to watch the green slime at the end?

[XenonGraphics101]

They are not going to tell you the answer right away. They expect you to think the answer by yourself.

[remibachmann]

Nope:) The guy in the vehicle traveling at the speed c, relative to the second observer (whom isn't moving), would meassure the speed of the light from the flashlight to 'c', relative to himself. And the non-moving observer would also meassure the speed of the light from the flashlight to 'c' relative to himself. While this seems counterintuitive, it makes alot more sense if you take relativity (Einstein stuff) into account.

[remibachmann]

The more "solid" and object is, the faster the speed of sound in that material will be. But the speed of sound can never be greater than the speed of light (or even come close to it, as far as i know). But if we were to assume that the speed of sound in the solid object was infinite/instant, then sure, You could push the button faster than the speed of light.

[Purple Haze]

Solar wind (witch push the spaceship out of it course) and light are two different things.

[rachaelbrooks2]

You didn't answer the question

[Seses209]

A solid tube is still made up of molecules. He says the push effect applies to all objects, not just slinkies - they are just the best way to demonstrate.

[Max Tube]

Man... You are discussing such brilliant stuff, thank you very much.... I wish I had your mind