Star A has luminosity LA = 100 L⊙ and it is 1000 pc away.Star B has the same luminosity as the Sun,L⊙,and it is 100 pc away.What can you say about the brightnesses of these two stars?
A) Star A is brighter than star B.
B) Star B is brighter than star A.
C) Star A and star B have the same brightness.
D) It is not possible to answer the question without knowing L⊙, the luminosity of the Sun.
Correct Answer:
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