Unpolarised light is incident from air on a plane surface of a material of refractive index μ. At a particular angle of incidence i, it is found that the reflected and refracted rays are perpendicular to each other. Which of the following options is correct for this situation?

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Reflected light is polarised with its electric vector parallel to the plane of incidence

Reflected light is polarised with its electric vector perpendicular to the plane of incidence

i=sin-11μ

i=tan-11μ

answer is B.

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Detailed Solution

When reflected light and refracted light are perpendicular, reflected light is polarised with electric field vector perpendicular to the plane of incidence. Also, tan i=μ (Brewster angle)

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