Star A and star B appear equally bright in the sky.Star A is twice as far away from Earth as star B.How do the luminosities of stars A and B compare?
A) Star A is four times as luminous as star B.
B) Star A is twice as luminous as star B.
C) Star B is twice as luminous as star A.
D) Star B is four times as luminous as star A.
Correct Answer:
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