How does the shift observed in the light from a galaxy relate to the distance of the galaxy from Earth?

A. The greater the distance, the more light is redshifted.

B. The greater the distance, the less light is redshifted.

C. At a great enough distance, the light becomes blueshifted.

D. There is no relationship between the shift and the galaxy's distance from Earth.

Question

Bennett Wu

Physics

12 May, 18:13

How does the shift observed in the light from a galaxy relate to the distance of the galaxy from Earth?

A. The greater the distance, the more light is redshifted.

B. The greater the distance, the less light is redshifted.

C. At a great enough distance, the light becomes blueshifted.

D. There is no relationship between the shift and the galaxy's distance from Earth.

+3

Answers (1)

Know the Answer?

Francis Gordon · Answer 1

The answer for this is "A. The greater the distance, the more light is redshifted."

This is according to the Doppler Effect which means that light waves seem to spread out (light is altered/redshifted) when light waves is moving away (greater distance).