IGNOU BPHCT 137 2026 - Describe polarisation of light by reflection. How does degree of polar

Question

Describe polarisation of light by reflection. How does degree of polarisation vary with angle of incidence of light?

19 Jan 2026

Answer :

Word Count : 237

When unpolarised light falls on a smooth transparent surface, such as glass or water, the reflected light becomes partially or completely plane polarised depending on the angle of incidence. This phenomenon is called polarisation by reflection. It occurs because the vibrations of the electric field component of light are resolved into two perpendicular directions: one parallel and the other perpendicular to the plane of incidence. When light is incident on a surface, part of it is reflected and part is refracted. At a particular angle of incidence, called

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