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Unpolarised light is incident from air on a plane surface of a material of refractive index '$\mu$'. 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?
Explanation
At Brewster's angle ($\tan i = \mu$) the reflected light is plane-polarised perpendicular to the plane of incidence.
Detailed Solution
When reflected light rays and refracted rays are perpendicular, reflected light is polarised with its electric field vector perpendicular to the plane of incidence.
Also, $\tan i = \mu$ (Brewster angle).
So the reflected light is polarised with its electric vector perpendicular to the plane of incidence.
Also, $\tan i = \mu$ (Brewster angle).
So the reflected light is polarised with its electric vector perpendicular to the plane of incidence.