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OpenStudy (anonymous):
One astronomer has observed an apparent lengthening of the electromagnetic waves given off by a star. Which of these conclusions is correct about the star? A. Its wavelength is decreasing B. Its parallax is increasing C. It is moving away from earth D. It is moving towards earth
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OpenStudy (aaronq):
lengthening waves = wavelength getting larger = red shifting this occurs when a body giving off light is moving away look more into the doppler effect
OpenStudy (anonymous):
@aaronq thank you!
OpenStudy (aaronq):
no problem
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