Multiple Choice
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.
Correct Answer:
Verified
Correct Answer:
Verified
Q13: One consequence of nuclear activity in otherwise
Q14: Which of the following paraphrases Hubble's Law?<br>A)The
Q15: Why do some quasars have redshifts greater
Q16: The quasars with the largest presently known
Q17: In what sense are the quasars "quasi-stellar"?<br>A)Their
Q19: In this diagram, the galaxy at the
Q20: A spherical galaxy, like M87, which
Q21: How does the Tully-Fisher relation allow the
Q22: If we are directly in the line
Q23: The elliptical galaxies are most like what