If the Sun-Earth separation was 10 AU instead of 1 AU, what would the flux of sunlight (energy per second per square meter) be at the Earth, compared to what it is today?
A) 10 times less
B) About 3.16 (or the square root of 10) times less
C) 10 times more
D) 100 times less
E) 100 times more
Correct Answer:
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