Question

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

Answer 1

flux ratio is 100

so correct option is C) 100.0

Step-by-step explanation:

given data

magnitude difference = 5

to find out

flux ratio

solution

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

magnitude difference =
`k log(f1)/(f2)` ...........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
`log(f1)/(f2)`

2 = - log F

so flux ratio is 100

so correct option is C) 100.0