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

Question

Quizplus · Accepted Answer

X-rays from the vicinity of a black hole originate from the hot gas in the accretion disk just outside the event horizon, not from inside the event horizon or the singularity itself, where no information can escape.

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