Definitions for michelson-morley experiment
michel·son-mor·ley ex·per·i·ment

Princeton's WordNetRate this definition:0.0 / 0 votes

1. Michelson-Morley experimentnoun

   a celebrated experiment conducted by Albert Michelson and Edward Morley; their failure to detect any influence of the earth's motion on the velocity of light was the starting point for Einstein's theory of relativity

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1. michelson-morley experiment

   The Michelson–Morley experiment was an attempt to detect the existence of the luminiferous aether, a supposed medium permeating space that was thought to be the carrier of light waves. The experiment was performed between April and July 1887 by American physicists Albert A. Michelson and Edward W. Morley at what is now Case Western Reserve University in Cleveland, Ohio, and published in November of the same year.The experiment compared the speed of light in perpendicular directions in an attempt to detect the relative motion of matter through the stationary luminiferous aether ("aether wind"). The result was negative, in that Michelson and Morley found no significant difference between the speed of light in the direction of movement through the presumed aether, and the speed at right angles. This result is generally considered to be the first strong evidence against the then-prevalent aether theory, as well as initiating a line of research that eventually led to special relativity, which rules out a stationary aether. Of this experiment, Albert Einstein wrote, "If the Michelson–Morley experiment had not brought us into serious embarrassment, no one would have regarded the relativity theory as a (halfway) redemption.": 219 Michelson–Morley type experiments have been repeated many times with steadily increasing sensitivity. These include experiments from 1902 to 1905, and a series of experiments in the 1920s. More recently, in 2009, optical resonator experiments confirmed the absence of any aether wind at the 10−17 level. Together with the Ives–Stilwell and Kennedy–Thorndike experiments, Michelson–Morley type experiments form one of the fundamental tests of special relativity.

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1. michelson-morley experiment

   The Michelson-Morley Experiment was a scientific experiment conducted in 1887 by physicists Albert A. Michelson and Edward W. Morley. The experiment aimed to detect the relative motion of matter through the supposed stationary luminiferous aether ("aether wind"). It was based on the expectation that the speed of light would be dependent on the motion of its source through the aether. However, the experiment found no difference in the speed of light regardless of the direction of measurement or the relative motion of the source, thereby disproving the existence of the aether and setting stage for Einstein's theory of relativity.

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References

1. ^ Princeton's WordNet
   http://wordnetweb.princeton.edu/perl/webwn?s=michelson-morley experiment
2. ^ Wikipedia
   https://en.wikipedia.org/wiki/Michelson-Morley_Experiment
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