Question

A black hole pulls in gas from a nearby companion star. _____ crossing the event horizon, this matter heats up and emits _____.

A. After; X-rays
B. Before; X-rays
C. After; infrared radiation
D. Before; infrared radiation

Answer 1

Hi!

The answer is B. A black hole pulls in gas from a nearby companion star. Before crossing the event horizon, this matter heats up and emits X-rays.

The reason it happens before it crosses the event horizon is that once it goes past the event horizon it cannot escape