In order for gravitational lensing of a distant quasar to occur,the galaxy producing the lensing must
A) be rotating rapidly in order to produce the requisite curvature of space to bend the light beam.
B) be almost perfectly placed on a line between Earth and the quasar.
C) contain a supermassive black hole at its center.
D) be a dwarf galaxy,otherwise the quasar's light cannot pass through it and reach Earth.

Question

Quizplus · Accepted Answer

Gravitational lensing occurs when a massive object, such as a galaxy or cluster of galaxies, bends the path of light from a more distant object, such as a quasar. For the lensing to occur, the massive object must be almost perfectly aligned between the distant object and the observer on Earth.

In Order for Gravitational Lensing of a Distant Quasar to Occur,the