Question

problem 32
when a star or galaxy is moving away from us, we observe the doppler effect by seeing the lines in its spectrum
blueshifted (shifted toward the blue or violet end of the light spectrum).
become darker and darker (like a blackbody).
yellowshifted (shifted so all the colors become a little bit yellower).
you cant fool me, the doppler effect only applies to motions on earth, not to the motions of the stars and galaxies.
redshifted (shifted toward the red end of the light spectrum).
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Explanation:

The Doppler effect for light shows that when a star or galaxy is moving away from us, the wavelengths of the light it emits are stretched, resulting in a shift towards the red - end of the spectrum. This is called redshift. Blueshift occurs when an object is moving towards us. The Doppler effect applies to celestial objects as well as objects on Earth. Blackbody radiation is a different concept related to the emission of radiation based on an object's temperature, and there is no such thing as "yellowshift" in this context.

Answer:

E. redshifted (shifted toward the red end of the light spectrum)