Multiple Choice
Stars: A star has absolute luminosity equal to that of the sun, which is 1.5 × 108 km from the earth, but this star is 32.6 light-years away from the earth. By what factor will it appear dimmer than the sun? (1 ly = 9.461 × 1015 m)
A) 2.4 × 10-9
B) 2.4 × 10-11
C) 2.4 × 10-13
D) 2.4 × 10-15
E) 2.4 × 10-17
Correct Answer:
Verified
Correct Answer:
Verified
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