Relatively rapid fluctuations (within 1 day) in the electromagnetic output of quasars is an indication of:
A)objects moving in front of them from our point of view.
B)the rapid rotation of the sources.
C)the relatively small size of the emitting regions.
D)their relative closeness to the Milky Way.

Question

Quizplus · Accepted Answer

Rapid fluctuations within 1 day indicate that the emitting region is relatively small, which suggests that the variability is caused by processes occurring close to the central black hole, rather than by external factors such as objects moving in front of the quasars. The rapid rotation of the sources or their relative closeness to the Milky Way are not necessarily related to the electromagnetic output fluctuations.

Relatively Rapid Fluctuations (Within 1 Day) in the Electromagnetic Output