Some quasars vary in brightness in only a few days.What does this tell us about the quasars?
A) They have large magnetic fields
B) They are quite small
C) They must be highly luminous
D) They cannot emit radio waves
Correct Answer:
Verified
Q1: Which of the following is a good
Q2: How do we know that quasars are
Q3: Since quasars are thought to be at
Q4: About how large is a 1 million
Q6: Why do Seyfert Galaxies strengthen the case
Q7: Quasars are currently believed to be
A)The brightest
Q8: Quasars were originally discovered as
A)Strong radio sources
Q9: Which of the following is true of
Q10: Quasars all have great distances.Why are there
Q11: How do we know that the quasars
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