The two interfering waves have intensities in the ratio `9 : 4`. The ratio of intensities of maxima and minima in the interference pattern will be

Options

A. `1 : 25`
B. `9 : 4`
C. `25 : 1`
D. `4 : 9`

Answer

C

Explanation

`(I_("max"))/(I_("min")) = ((sqrt((I_(1))/(I_(2)) + 1))/(sqrt((I_(1))/(I_(2)) -1)))^(2) = ((sqrt((9)/(4) + 1))/(sqrt((9)/(4) - 2)))^(2) = (25)/(1)`