20 Things You Didn't Know About... Relativity

Tue, 20 May 2008 19:49:07 GMT

clipped by: Mohir
clipper's remarks: the rest of the 20 in the website

1 Who invented relativity? Bzzzt—wrong. Galileo hit on the idea in 1639, when he showed that a falling object behaves the same way on a moving ship as it does in a motionless building.

2 And Einstein didn’t call it relativity. The word never appears in his original 1905 paper, “On the Electrodynamics of Moving Bodies,” and he hated the term, preferring “invariance theory” (because the laws of physics look the same to all observers—nothing “relative” about it).

3 Space-time continuum? Nope, that’s not Einstein either. The idea of time as the fourth dimension came from Hermann Minkowski, one of Einstein’s professors, who once called him a “lazy dog.”

4 But Einstein did reformulate Galileo’s relativity to deal with the bizarre things that happen at near-light speed, where time slows down and space gets compressed. That counts for something.

5 Austrian physicist Friedrich Hasenöhrl published the basic equation E = mc² a year before Einstein did.

Tags: relativity, einstein, physics, trivia

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20 Things You Didn't Know About... Relativity