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Question
The observed spectral lines of a star are all shifted towards the red end of the spectrum. Which statement is true?A) This is an example of the photoelectric effect.
B) This is an example of the Doppler effect.
C) The second law of Kirchhoff explains this.
D) The star is not rotating.
E) The star has a radial velocity towards us.
Answer
This answer is hidden. It contains 1 characters.
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