___________ is (are) observed when light from a distant quasar travels past a massive galaxy between us and the quasar, and this light is focused to form two or more images of the same quasar.
A)A double-lobed radio galaxy
B)Superluminal expansion
C)The gravitational lens effect
D)A blazar
E)Gravitational waves

Question

Quizplus · Accepted Answer

The gravitational lens effect is observed when light from a distant quasar is bent by the gravitational field of a massive galaxy between us and the quasar, and this bending causes the light to form two or more images of the same quasar. This is a useful tool for astronomers to study both the quasar and the galaxy acting as the lens.

___________ Is (Are) Observed When Light from a Distant Quasar