Question

what is the relation between polarising angle and critical angle

Answer 1

tani = 1/sinc where i is the polarising angle and c is the critical angle

Answer 2

The relation formed between the angles will be sinθc = 1/tani

The angle of polarisation is the angle between the direction of the electric field and the axis of incidence, where as critical angle is the angle of incidence in a denser medium having angle of refraction as 90 °

• The angle where an unpolarized light or any other electromagnetic radiation must occur on a non-metallic surface for the reflected radiation to achieve optimum plane polarization is the angle of polarization.
• The angle of incidence past which light rays travel through a denser medium to a less dense medium that no longer refract, but fully reflect is called the critical angle.

• Relation between the angles -

        Tani = μ = refractive index is μ, then angle must be such that -

        Tani = μ for polarization of reflected light.

         When reflection takes place between two transparent media at critical angle, then -  sinθc = 1 /μ

        = sinθc = 1/tani