Suppose the speed of the galaxy in increased by a factor
Chapter 25, Problem 93GP(choose chapter or problem)
Problem 93GP
Suppose the speed of the galaxy in Problem is increased by a factor of 10; that is, V = 3.600 × 106 m/s. The speed of the arms, v, and the frequency of the light remain the same. (a) Does the arm near the top of Figure 25–26 show a red shift (toward lower frequency) or a blue shift (toward higher frequency)? Does the lower arm show a red or a blue shift? Explain. What frequency is detected by astronomers observing (b) the upper arm and (c) the lower arm?
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