The frequency of light reaching Earth from a particular
Chapter 25, Problem 15P(choose chapter or problem)
Problem 15P
The frequency of light reaching Earth from a particular galaxy is 12% lower than the frequency the light had when it was emitted. (a) Is this galaxy moving toward or away from Earth? Explain. (b) What is the speed of this galaxy relative to the Earth? Give your answer as a fraction of the speed of light.
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