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Unformatted text preview: In Einstein's day, physicists questioned whether the relativity principle could be applied to electrodynamic theory as well. Was it also true that the laws of electrodynamics were the same in all reference frames? Physicists were particularly interested in whether the earth's velocity could be detected with respect to the ether, a substance postulated by scientists as a medium through which light waves travel. In the 1880s, the American physicists Albert Michelson and Edward Morley constructed a dev ice called an interferometer to measure the earth's velocity with respect to the ether, but were unable to detect any movement. However, there is no evidence that Einstein was familiar with these results when he dismissed altogether the concept of the et her in his relativity paper. Einstein claimed that it is impossible to detect whether or not one is moving with paper....
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- Fall '09
- relativity theory, physicists Albert Michelson, light waves travel., freely moving observers., twin returns home