Question

Gravitational lensing ___. (A) occurs when light passes near a massive object and is deflected by the object's gravitational field.(B) occurs when the mass of a galaxy is greater than expected from the luminosity of the galaxy.(C) can be used to determine the recessional velocity of a galaxy.(D) can be used to determine the luminosity of a galaxy.

Answer 1

(A) occurs when light passes near a massive object and is deflected by the object's gravitational field.

Step-by-step explanation:

Gravitational lensing occurs when a mass distribution of matter is able to bend the light coming from a source as light travels towards the observer. This effect was predicted by Einstein's general theory of relativity. A galaxy cluster is a mass distribution that acts as a gravitational lens. This effect allows us to see what is behind the sun. As the mass of the sun is very large light curves around the sun.