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14.Find the polarising angle of light, if critical angle of medium is sin-il

Answer»

Ifiis polarizing angle andcis critical angle for a medium, taking other medium as air for which refractive index=1, then the two are related via expressiontan i=1/ sinc...........(1)i=tan^−1(1/sinc)

Here c= sin^-1(3/4)

now putting value in the relation we get,

i =tan^-1(1/sin(sin^-1(3/4)))i =tan^-1(4/3)

so the polarising angle is tan^-1(4/3)



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