The critical angle for total internal reflection for cubic zirconia surrounded by air is 27.0°. calculate the polarizing angle for cubic zirconia.

Polarizing angle,

Given:

Critical angle,

Solution:

Now, in Total Internal Reflection (TIR), the critical angle for cubic zirconia is given by:

                     (1)

where

= refractive index of zirconia

From eqn (1):

Now, the angle of polarization is given by:

tan

Therefore,

i think the answer is a, hope this : )