The ABC of Relativity, by Bertrand Russell, Part 2
Boring Books for Bedtime Readings to Help You Sleep
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The Mickelson Morley Experiment
If a fly touches the surface of a stagnant pool, it causes ripples which move outwards and widening circles. The center of the circle at any moment is the point of the pool touched by the fly. When the ripples correspond to the light waves, such a state of affair seems at first sight quite impossible. It is no wonder that although the Mickelson Morley experiment was made in 1881, it was not rightly interpreted until 1905.
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