Although theory says a massive black hole with an accretion disk should be emitting X-rays,many black holes emit:
A)mostly in the infrared.
B)only in the visible.
C)mainly in the gamma.
D)virtually no radiation at all.
E)equally across the entire electromagnetic spectrum.

Question

Quizplus · Accepted Answer

Although theory predicts X-ray emission from black holes with accretion disks, many black holes actually emit mostly in the infrared due to the presence of dust in the disk that absorbs and re-radiates the energy as infrared light. Many black holes emit mostly in the infrared despite theory predicting X-ray emissions. This is because the accretion disk surrounding the black hole may be obscured by a thick cloud of gas and dust. As a result, the infrared radiation from the disk is able to pass through the cloud while the X-rays are absorbed.

Although Theory Says a Massive Black Hole with an Accretion