X-rays that come from the vicinity of a black hole actually originate from
A) well inside the event horizon.
B) its exact center,or singularity.
C) relatively far away from the black hole,where matter is still relatively cool.
D) just outside the event horizon,on the accretion disk.

Question

Quizplus · Accepted Answer

X-rays that come from the vicinity of a black hole originate from just outside the event horizon, on the accretion disk. The intense gravity of the black hole pulls in surrounding matter, which heats up and emits X-rays before being engulfed by the event horizon.

X-Rays That Come from the Vicinity of a Black Hole