PHY3063 R. D. Field Department of Physics Chapter1_18.doc University of Florida Relativistic Doppler Shift (source moving away)Consider a flashlight at rest in the O'-frameshinning its light in the –x' direction. Since the O'-frameis at rest with the source of light f' = f0, λ' = λ0, and T' = T0, where f0, λ0, and T0are the “proper frequency”, “proper wavelength”, and “proper period”of the light. Let event Abe the occurrence of wavefront 2 reaching the O-frameand let event Bbe the occurrence of wavefront 3 reaching theO-frame, etc.. AFrame O'x'ct'cT0proper periodat rest with lightsourceB132∆x'=-V∆t'45oLight PathO-frame Pathc∆t'AFrame OxctB13245oLight PathO'-frame Path
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