Suppose on earth you measure a frequency of 6.3x10^13 Hz from a star in a distant galaxy. You do your research, and notice that the star is actually emitting a frequency of 6.4x10^13 Hz. Cool! What is the relative speed of the earth and the observed star?

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Q: Suppose on earth you measure a frequency of 6.3x10^13 Hz from a star in a distant galaxy. You do…

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