On a glass plate, a light wave is incident at an angle of `60^(@)`. If the reflected and the refracted waves are mutully perpendicular, the refractive index of material is

Options

A. `(sqrt(3))/(2)`
B. `sqrt(3)`
C. `(3)/(2)`
D. `(1)/(sqrt(2))`

Answer

B

Explanation

n `= (sini)/(sin r)`
`rArr " " n= (sin 60^(@))/(sin 30^(@))`
`rArr n = sqrt(3)`.