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A light source emits a series of pulses the distance between which is L (e.g. L=300000 km). A stationary observer measures the frequency of the pulses to be f, their speed to be c and the distance between them to be L:
f = c/L Let the observer start moving with speed v relative to the source (v is small so that the relativistic corrections can be ignored). The moving observer measures the frequency of the pulses to be f'=f(1±v/c)=(c±v)/L, their speed to be c' and the distance between them to be L': f' = c'/L' The crucial questions a c' = ? ; L' = ? Newton's emission theory of light gives a straightforward answer: Newton's answer: c' = c±v ; L' = L Einstein's special relativity says that c'=c but Einsteinians are usually silent about L'. Still f' and c' determine L' unequivocally: Einstein's answer: c' = c ; L' = Lc/(c+v) when the observer moves towards the source ; L' = Lc/(c-v) when the observer moves away from the source. Clearly Einstein's answer is absurd. Special relativity predicts a miraculous length contraction (which has nothing to do with the length contraction of the Lorentz transforms) when the observer starts moving towards the source and an equally miraculous length elongation when the observer starts moving away from the source. Conclusion: The speed of light is c'=c±v, not c'=c. Pentcho Valev |
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