150. 2022年11月10日 13:22:31 : WY8EzFyMoc : MWpiZkVnY1BmaE0=[1]
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Starlight is coming from outer space. When an observer moves in the direction of the light path, frequency of starlight varies. For speed of light, there is a formula c = f λ. As for varying of frequency, what varies (in the formula above) ? λ seems to be widely accepted ?
There seem to be a lot of physicists who don't care.
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