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

Question

Quizplus · Accepted Answer

The Answer of 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

Extinction by the Interstellar Medium Dims Starlight by About 2