Question

White light is incident on the interface of glass and air as shown in figure. If green ligth is just totally internally reflected then the emerging ray in air contains

A. yellow, orange, red
B. violet, indigo, blue
C. all colours
D. all colours except green

Answer 1

Correct Answer - A
`underset("V I B G Y O R")rarrmu` decreases
`sinC=1/mu`
As `mu` increases, C decreases.
If green ligth is just totally reflected, violet, indigo, blue will be totally reflected because critical angles for them would be smaller than critical angle for green.