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Lorentz-Fitzgerald contraction
| There was a young fencer named Fisk, whose movements were exceedingly brisk. So fast was his action, the Lorentz Contraction diminished his sword to a disk. |
The contraction in length of a moving body, as measured by an observer at rest with respect to the body, by the factor 1/√(1 - ν2/c2), where ν is the relative speed of the moving body and c is the speed of light. Also called the Lorentz contraction, it one of the surprising effects predicted by Einstein's special theory of relativity. Compare with time dilation.
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