Redshift is observed when...

Question

a
a luminous object is STATIONARY compared to an observer.
b
a luminous object travels ALONGSIDE an observer.
c
a distant luminous object travels rapidly TOWARDS an observer.
d
a distant luminous object travels rapidly AWAY from an observer.

Answer 1

Redshift is observed when:

d. a distant luminous object travels rapidly AWAY from an observer.

Redshift occurs because the wavelengths of light from an object that is moving away from us are stretched, making the light appear redder than it would if the object were stationary. This phenomenon is a key concept in astrophysics and is used to determine the movement and distance of distant galaxies.