Question

A ray of light is incident on the left vertical face of the glass slab. If the incident light has an intensity I and on each reflection the intensity decreases by 90% and on each refraction the intensity decreases by 10%, find the ratio of the intensities of maximum to minimum in reflected pattern.

Answer 1

Correct Answer - A::C
`I_1 = 0.1 I_0 , I_2 = 0.081 I_0 `

`:. sqrt (I_1/I_2) = 10/9`
`:. I_(max)/I_(min) = ((sqrt(I_1//I_2)+1)/(sqrt (I_1/I_2) -1))^2`
`=(19)^2`
= 361.