Now suppose youhave two stars, with one them 2times more luminous than the other. From Earth...
Now suppose youhave two stars, with one them 2times more luminous than the other. From Earth you see that they both appear to have exactly the same apparent brightness or intensity. How much farther away is the bright star compared to the fainter one?
Homework Answers
as the intensity of the light reaching
Intensity = Power/(4pi * d^2)
as bright star is 2 times brighter
the power will be 2 times
P1/d1^2 = P2/d2^2
>> P1/P2 = 2 = (d1/d2)^2
d1/d2 = sqrt(2)
the bright star is sqrt(2) times or 1.414 times the fainter star
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