A light waves travels from glass to water. The refractive index for glass and water are `3/2` and `4/3` respectively. The value of the critical angle will be

Options

A. `sin^(-1)(1/2)`
B. `sin^(-1)(9/8)`
C. `sin^(-1)(8/9)`
D. `sin^(-1)(5/7)`

Answer

C

Explanation

`3/2 sin C=4/3 sin 90`
`rArr C=sin^(-1)(8/9)`