![]() The most important was written by Lorentz, who postulated that light travels at a speed of c through the ether, and that when other objects move through the ether, they are compressed in the direction of motion, and their time slows down. There were several articles before Einstein's trying to explain how this could happen. This means that two persons that follow the same light ray at different speeds will measure the same relative speed for the ray. Related subjects: General PhysicsĮverything started with the Michelson-Morley experiment to determine the absolute speed of the Earth through the theorised " luminiferous aether." The experiment was a failure but it did show something: the speed of light is independent of the speed of the observer.
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