The lensing of a distant quasar is produced by ________ of a foreground galaxy.
A)all the normal matter and dark matter
B)only the mass of the black hole in the nucleus
C)an individual star
D)a pulsar's intense magnetic field
E)a relativistic jet

Question

Quizplus · Accepted Answer

The lensing of a distant quasar is produced by the gravitational pull of all the mass (normal matter and dark matter) in a foreground galaxy. Lensing occurs when the gravity of a foreground object (such as a galaxy) bends the path of light from a distant object (such as a quasar). This bending can occur due to the gravitational pull of all the normal matter and dark matter in the foreground object, not just a single component like a black hole, star, pulsar, or relativistic jet.

The Lensing of a Distant Quasar Is Produced by ________