Question

Define critical angle and polarising angle what is the relation between the two angles ?

Answer 1

$Polarizationangle:-$ The angle at which unpolarized light or other electromagnetic radiation must be incident upon a nonmetallic surface for the reflected radiation to acquire maximum plane polarization$.$

$Criticalangle:-$ The angle of incidence beyound which rays of light passing through a denser medium to the surface of a less dense medium are no longer refracted but totally reflected$.$

Relationship for light waves stating that the maximum polarization $($vibration in one plane only$)$ of a ray of light may be achieved by letting the ray fall on a surface of a transparent medium in such a way that the reflected ray makes an angle of ${90}^0$ with the reflected ray$.$