Multiple Choice
Extinction by the interstellar medium dims starlight by about 2 magnitudes for every 1000 pc the light travels.What fraction of the photons remains from a star that is 5000 pc from an observer?
A) 1/10
B) 1/5
C) 1/25
D) 1/10,000
E) 1/100
Correct Answer:
Verified
Correct Answer:
Verified
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