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Question
(i) State Brewster's law.
(ii) Find Brewster's angle for a transparent liquid having refractive index 1·5.
Solution
(i) Brewster's law states that at polarization, angle of incidence reflected and refracted rays are at a right angle to each other.
(ii) `mu` = tan ip where ip = Brewster;s angle
∴ tan ip = 1 - 5
∴ ip = tan-1 1.5
ip = 56.3°
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