Question

According to the Doppler effect, objects moving away from Earth would have a

A. cooling appearance.
B. blue shift.
C. red shift.
D. warming appearance.

Answer 1

The correct answer is:

redshift.

Explanation:

Redshift and blueshift describe how light shifts approaching shorter or longer wavelengths as objects in space (such as stars or galaxies) move closer or removed away from us. The knowledge is key to charting the universe's expansion. Visible light is a spectrum of colors, which is clear to anyone who has observed at a rainbow.

Answer 2

According to the Doppler effect, objects moving away from Earth would have a redshift. A redshift means that every wavelength becomes longer and if we observe Hydrogen lines that are at a certain position, those will become redshifted.