Einstein's Proof of E=mc²
Ever wonder how Einstein proved E=mc²? This is how. Pi day (3.14) is Albert Einstein's Birthday! To celebrate, we'll explain 4 of his most groundbreaking papers from 1905, when he was just...
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In mid 1905, Albert Einstein derived what is now the most famous equation in the world:E equals M C squared. But he didn't just write this down out of the blue – it followeddirectly from his paper on special relativity that we talked about in last week's video…and here's how he did it:Suppose you're watching a cat float freely in empty space, when suddenly it emits a flashof light in all directions. The light carries away some energy, we'll call it "E", so byconservation of energy the cat must have lost energy E… but since the light was emittedsymmetrically in all directions, it won't have changed the cat's velocity. So wheredid the energy for the light come from?Never mind that now… let&a...
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In mid 1905, Albert Einstein derived what is now the most famous equation in the world:E equals M C squared. But he didn't just write this down out of the blue – it followeddirectly from his paper on special relativity that we talked about in last week's video…and here's how he did it:Suppose you're watching a cat float freely in empty space, when suddenly it emits a flashof light in all directions. The light carries away some energy, we'll call it "E", so byconservation of energy the cat must have lost energy E… but since the light was emittedsymmetrically in all directions, it won't have changed the cat's velocity. So wheredid the energy for the light come from?Never mind that now… let&a...
