Equivalence Principle
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nakayama

Yokohama, Japan

#21 Jan 24, 2013
Books show an elevator accelerating upward. Now, imagine two elevator cabins (moving upward and downward in a uniform motion) and two light rays (coming horizontally from the outside of the cabins). All will be a problem of geography.
nakayama

Yokohama, Japan

#22 Jan 26, 2013
Sorry, i made a mistake in above post.

Right is "geometry". Wrong is "geography".

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