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THE MOST CRUCIAL QUESTION IN RELATIVITY
A light source emits a series of pulses the distance between which is d (e.g. d=300000km). A stationary observer/receiver measures the frequency of the pulses to be f=c/d:
http://www.einstein-online.info/imag...ler_static.gif An observer/receiver moving with speed v (let v be small so that the relativistic corrections can be ignored) towards the light source measures the frequency of the pulses to be f'=(c+v)/d: http://www.einstein-online.info/imag...ector_blue.gif The most crucial question: Why does the frequency shift from f=c/d to f'=(c+v)/d ? Answer 1 (fatal for relativity): Because the speed of the pulses relative to the observer/receiver shifts from c to c'=c+v. Answer 2 (saving relativity): Because... I know of no reasonable statement that could become Answer 2. Pentcho Valev |
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