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

Verified
Correct Answer:
Verified
Q13: Radio galaxies emit only radio waves, and
Q14: The Milky Way is considered to be
Q15: The Tully- Fisher relation exists between the
Q16: Seyferts have properties that lie between quasars
Q17: In this diagram, the galaxy at the
Q19: While our Magellanic Clouds are irregulars, the
Q20: The additional energy given off by active
Q21: What is the nearest huge cluster of
Q22: Relate Seyferts to spirals.
Q23: The optical classification of galaxies was pioneered