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+2 votes
15.8k views
in Physics by (61.9k points)

State Brewster's law. 

The value of Brewster angle for a transparent medium is different for light of different colours. Give reason.

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Brewster's Law: It states that when light is incident at polarising angle at the interface of a refracting medium, the refractive index of the medium is equal to the tangent of the polarising angle. 

μ = tan P, μ = refractive index 

P: polarising angle. 

As Brewster angle depends on the refractive index and wavelength, so it is different for different colours.

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