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Ask a Spaceman!

AaS! 29: Why does E=mc^2?

Ask a Spaceman!

Paul M. Sutter

Astrophysics, Science, Cosmos, Holes, Black, Astronomy, Natural Sciences, Universe, Cosmology, Space, Physics

4.8853 Ratings

🗓️ 5 April 2016

⏱️ 37 minutes

🧾️ Download transcript

Summary

Why does E=mc^2? Where does it come from? What’s the significance of that famous equation? I discuss these questions and more in today’s Ask a Spaceman!

Follow all the show updates at askaspaceman.com, and help support the show at patreon.com/pmsutter!

Keep those questions about space, science, astronomy, astrophysics, and cosmology coming to #AskASpaceman on Twitter@PaulMattSutter and Facebook/PaulMattSutter for COMPLETE KNOWLEDGE OF TIME AND SPACE! Music by Jason Grady and Nick Bain.

Transcript

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0:00.0

You know what time it is. It's time for Ask a Space man. I'm your host, Paul Sutter. You've got questions and I've got the answers. You know how this show works, but let's take it from top to bottom just

0:21.3

in case. You go online, use the hashtag Ask a Spaceman on Twitter or Facebook, send some

0:27.7

questions my way, I'll collect them, and I'll answer them on this very show. You can also go to the

0:33.2

website, Ask aSpaceman.com. There you'll also find show notes, place to comment, place to ask

0:38.9

questions, place to follow up on episodes. If you're curious, you can also find the show on

0:43.5

YouTube.com slash c slash ask a space man, all the same name because that's like the name of the show.

0:50.3

You can also follow me directly on Twitter and Facebook. My name is Paul Matt Sutter.

0:56.0

That's my name.

0:57.0

And I do the show, Ask a Spaceman.

0:59.2

All those ways.

1:00.5

Oh, you can email me too.

1:01.8

Ask a Spaceman at gmail.com.

1:04.6

However you send it, get those questions to me, and I'll figure out how to answer them.

1:09.9

So we have just one little goal with this show.

1:15.9

Complete knowledge of time and space.

1:18.6

And on the road to completeness of knowledge of time and space,

1:24.0

we have a question today from Scott Sullivan.

1:27.0

He asked by email, why does E equal

1:31.9

MC squared? And this is perhaps, I mean, gosh, E equals MC squared. Perhaps the most famous equation

1:43.4

in all of physics.

1:45.2

Like everybody knows it and there's the famous picture of Einstein running

1:48.9

E equals MC squared on the chalkboard.

...

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