If the Distance Between Us and a Star Is Doubled,with

If the distance between us and a star is doubled,with everything else remaining the same,the luminosity

A) is decreased by a factor of four,and the apparent brightness is decreased by a factor of four.
B) is decreased by a factor of two,and the apparent brightness is decreased by a factor of two.
C) remains the same,but the apparent brightness is decreased by a factor of two.
D) remains the same,but the apparent brightness is decreased by a factor of four.
E) is decreased by a factor of four,but the apparent brightness remains the same.

Correct Answer:

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