A parallel beam of light of intensity I is incident on a glass plate. `25%` of light is reflected in any reflection by upper surface and `50%` of light is reflected by any reflection from lower surface. Rest is refracted The ratio of maximum to minimum intensity in interference region of reflected rays is

Options

A. `[((1 // 2)+(sqrt3 // sqrt8))/((1 // 2)-(sqrt3 // sqrt8))]^(2)`
B. `[((1 // 4)+(sqrt3 // sqrt8))/((1 // 2)-(sqrt3 // sqrt8))]^(2)`
C. `(5)/(8)`
D. `(8)/(5)`

Answer

A