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Unformatted text preview: ight at a rotating mirror, which reflected to a stationary mirror, back to the rotating mirror, and finally back toward the source. Because the rotating mirror turned slightly while the light was traveling to the stationary mirror and back, the rotating mirror reflected the light at a slight angle. This angle allowed him to calculate c. Michelson-Morely Experiment
Albert Michelson is best known for an experiment he did with Edward Morely
in 1887. At the time it wasn’t understood that light needed no medium
through which to travel. It was proposed that light traveled through an
invisible “ether” in space. The Michelson-Morely experiment was an attempt
to detect Earth’s motion through the ether. Here’s how it worked: First
imagine you’re standing still outside and there is a wind coming from the
north. If you run north, you’ll measure a greater wind speed. If you run south,
you’ll measure it slower. Whether you run north or south, though, you’ll still
feel the wind coming from the north. If yo...
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This note was uploaded on 11/17/2011 for the course PHYS 121 taught by Professor Burgeson during the Fall '11 term at BYU.
- Fall '11