An Astronomer Observes Electromagnetic Waves Emitted by Oxygen Atoms in a Distant

An astronomer observes electromagnetic waves emitted by oxygen atoms in a distant galaxy that have a frequency of 5.710 × 10¹⁴ Hz. In the laboratory on earth, oxygen atoms emit waves that have a frequency of 5.841 × 10¹⁴ Hz. Determine the relative velocity of the galaxy with respect to the astronomer on the earth. Note: The speed of light is 2.9979 × 10⁸ m/s.

A) 6.724 × 10⁶ m/s, away from earth
B) 6.724 × 10⁶ m/s, toward earth
C) 2.931 × 10⁸ m/s, away from earth
D) 4.369 × 10⁴ m/s, toward earth
E) 4.369 × 10⁴ m/s, away from earth

Correct Answer:

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