NEET 2018 Physics question
Unpolarised light is incident from air on a plane surface of a material of refractive index ''. At a particular angle of incidence '', it is found that the reflected and refracted rays are perpendicular to each other. Which of the following options is correct for this situation?
Answer: (2)
Solution
When the reflected and refracted rays are perpendicular, the angle of incidence equals the Brewster (polarising) angle , with , i.e. . Hence options (1) and (4) are wrong (neither , which is the critical-angle form, nor
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