Question

Show using a proper diagram how unpolarised light can be linearly polarised by reflection from a transparent glass surface.

Answer 1

Polarisation by Reflection

An ordinary beam of light, on reflection from a transparent medium, becomes partially polarised. The degree of polarisation increases as the angle of incidence is increased. At a particular value of the angle of incidence, the reflected beam becomes completely polarised. This angle of incidence is called the polarising angle (p).