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Lorentz-FitzGerald contraction

[lawr-uh nts-fits-jer-uh ld, lohr-] /ˈlɔr ənts fɪtsˈdʒɛr əld, ˈloʊr-/
noun, Physics.
Origin
1920-1925
1920-25
Dictionary.com Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2014.
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British Dictionary definitions for lorentzfitzgerald contraction

Lorentz-Fitzgerald contraction

noun
1.
the supposed contraction of a body in the direction of its motion through the ether, postulated to explain the result of the Michelson-Morley experiment. The special theory of relativity denies that any such real change can occur in a body as a result of uniform motion but shows that an observer moving with respect to the body will determine an apparent change given by a formula similar to that of Lorentz and Fitzgerald
Word Origin
C20: named after H. A. Lorentz and G. F. Fitzgerald (1851–1901), Irish physicist
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition
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lorentzfitzgerald contraction in Science
Lorentz-FitzGerald contraction
  (lôr'ənts-fĭts-jěr'ld)   
The shortening of an object along its direction of motion as its speed approaches the speed of light, as measured by an observer at rest with respect to the body. Lorentz-FitzGerald contraction is an effect predicted by Einstein's theory of Special Relativity. It is named for Dutch physicist Hendrik Lorentz and Irish physicist George Francis FitzGerald (1851-1901), who independently proposed such a contraction. See more at relativity.
The American Heritage® Science Dictionary
Copyright © 2002. Published by Houghton Mifflin. All rights reserved.
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