Pentcho Valev
unread,Oct 19, 2012, 4:37:52 PM10/19/12You do not have permission to delete messages in this group
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A stationary source sends a light pulse towards a stationary observer/receiver. Then the source starts moving towards the observer and sends another pulse. The two pulses are physically different, judging from the different frequency they will have at reception, and the difference is obviously created BEFORE reception. What does the difference consist in? Two answers are conceivable:
(A) The speed of the second pulse (relative to the observer) is higher than the speed of the first. Needless to say, this is fatal for relativity.
(B) The wavelength of the second pulse is shorter than the wavelength of the first. This is also fatal for relativity but for a different reason. If the wavelength of light varies with the speed of the source (as is the case with sound waves), then the principle of relativity is violated - the motion of the light source towards the observer is not equivalent to the motion of the observer towards the source. As the source changes its speed, various wavelengths travel between source and receiver. This does not happen when the receiver changes its speed.
Pentcho Valev