Which of the following correctly describes the Doppler effect?
A. An approaching wave gets squeezed.
B. A galaxy moving towards us will appear red because the light waves are squeezed.
C. The wavelength of any EM wave gets shorter as its source moves away.
D. Both A and B
A. An approaching wave gets squeezed.
B. A galaxy moving towards us will appear red because the light waves are squeezed.
C. The wavelength of any EM wave gets shorter as its source moves away.
D. Both A and B
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Answer:
D
Explanation:
because the answer is A&B