relativity_6 - PHY2061 R. D. Field PHY2060 Review Moving...

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PHY2061 R. D. Field Department of Physics relativity_6.doc University of Florida Moving Lengths Parellel Moving Lengths: The “proper length”, L 0 , of a rod is defined to be its length at rest. Suppose the rod is at rest in the O'-frame so that Δ x' = L 0 . The length of the moving rod as observed in the O-frame , L, is defined be marking both ends of the rod simultaneously in S ( i.e. Δ t=0). Thus, ) ( t c x x Δ Δ = Δ β γ implies that L x L x = Δ = = Δ 0 and / 0 L L = where / 1 / =
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