If the polarising angle for a given medium is ` 60^@`, then the refractive index of the medium is

Explanation

Given, polarising angle , `i_p = 60^@`
`:.` Refractive index is
`mu = tan i_p = tan 60^@ = sqrt(3) = 1.732`.
Critical angle is given by
`sin i_c = 1/(mu) = 1/(sqrt3) = 0.5774`
`:. i_c = sin^(-1) (0.5774) = 35.27^@`.