An unpolarised light is incident on a plate of refractive index `sqrt(3)` and the reflected light is found to be completely plane constant. The angles of incidence and refraction are repectively:

Options

A. `60^(@), 30^(@)`
B. `30^(@), 60^(@)`
C. `sin^(-1)(1/sqrt(3)), 45^(@)`
D. `tan^(-1)(sqrt(3)/2), 30^(@)`

Answer

A

Explanation

`tan theta_(i) = mu rArr tan theta_(i) = sqrt(3) rArr theta_(i) = 60^(@)` also `1 sin 60^(@) = sqrt(3) sin r rArr r = 30^(@)`