A parallel beam of light of intensity I is incident an a glass plate, 25% of light is reflected by upper surface and 50% of light is reflected by flower surface. The ratio of maximum to minimum intensity in interference region of reflected rays is (Assume that cohen light reflected from lower surface refracts from upper surface it entirely come out)

A parallel beam of light of intensity I is incident an a glass plate, 25% of light is reflected by upper surface and 50% of light is reflected by flower surface. The ratio of maximum to minimum intensity in interference region of reflected rays is (Assume that cohen light reflected from lower surface refracts from upper surface it entirely come out)