What will happen to the absorption and/or emission spectral lines of an object moving away from earth at high speed?
a. they will be shifted toward the blue end of the spectrum.
b. they will be made more intense.
c. they will be shifted toward the red end of the spectrum.
d. they will be made less intense.
e. they will be unaffected. submit

c. They will be shifted toward the red end of the spectrum.

Explanation:

When the absorption or emission lines of a moving object away from from the earth at very high speed then the spectral lines  will be shifted toward the red end of the spectrum.This effect can be easily understand by Doppler effect..

So the our option c is correct.

c. They will be shifted toward the red end of the spectrum.