If spectral lines from a distant galaxy are 30% longer than when the source is at rest, how fast is the galaxy receding? O a. 0.30 c O b.0.26 c O c. 2.69 c d. 0.69 c

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If spectral lines from a distant galaxy are 30% longer than when the source is at rest, how fast is the galaxy receding?
O a. 0.30 c
b.0.26 c
O c. 2.69 c
d.0.69 c
Transcribed Image Text:If spectral lines from a distant galaxy are 30% longer than when the source is at rest, how fast is the galaxy receding? O a. 0.30 c b.0.26 c O c. 2.69 c d.0.69 c
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