Question

Which statements accurately describe the Doppler effect?

Select three options:

1) It is used to learn about the behavior of the universe.

2) It was used by Hubble to measure velocities of galaxies.

3) It indicates galaxy motion through light wavelengths.

4) It indicates a galaxy moving toward Earth through red shift.

5) It indicates a galaxy moving away from Earth through blue shift.

Answer 1

1,2,3 correctly describe doppler effect. When a celestial object moves nearer, it shows blue shift and vice-versa.