PHY2061 R. D. Field Department of Physics relativity_6.doc University of Florida Moving LengthsParellel Moving Lengths: The “proper length”, L0, of a rod is defined to be its length at rest. Suppose the rod is at rest in the O'-frameso that Δx' = L0. 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.Δt=0). Thus, )(tcxxΔ−Δ=′Δβγimplies that LxLx=Δ==′Δ0and /0LL=where /1/=
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