If two stars have a magnitude difference of 5, what is their flux ratio? a) 10.0 b) 12.6 c) 100.0 d) 250.0

flux ratio is 100

so correct option is  C) 100.0

Explanation:

given data

magnitude difference = 5

to find out

flux ratio

solution

we know that magnitude difference ( m1 -m2) is calculate as

magnitude difference =     ...........1

here f1 and f2 are flux ratio

and we know k = -2.5 is a constant

so put here value we get

5 = -2.5

2 = - log F

so flux ratio is 100

so correct option is  C) 100.0