In Young's double slit experiment, if the slit widths are in the ratio `1:9`, then the ratio of the intensity at minima to that at maxima will be

Options

A. (a) `1`
B. (b) `1//9`
C. (c) `1//4`
D. (d) `1//3`

Answer

C

Explanation

Slit with ratio `=1:9`
Since slit width ratio is the ratio of intensity and intensity `prop (amplitude)^2`
`:. I_1:I_2=1:9`
`impliesa_1^2:a_2^2=1:9impliesa_1:a_2=1:3`