Multiple Choice
Extinction by the interstellar medium dims starlight by about 2 magnitudes for every 1,000 pc the light travels.If a star is observed to have a magnitude of 7,and it is determined to be at a distance of 2,000 pc,what would the magnitude be if there was no extinction?
A) 7
B) 1.75
C) 28
D) 11
E) 3
Correct Answer:
Verified
Correct Answer:
Verified
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