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Suppose a galaxy is observed moving away from the Earth. Which of the following could be the frequency of the the $656 \text{ nm}$ spectral line for Hydrogen?

A

$4.00 \times 10^{14} \text{ Hz}$

B

$5.00 \times 10^{14} \text{ Hz}$

C

$6.00 \times 10^{14} \text{ Hz}$

D

$7.00 \times 10^{14} \text{ Hz}$

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