First slide

Ray optics

Question

The angle of incidence at which reflected light is totally polarized for a ray travelling from air to glass (refractive index n), is

Easy

A

$Ta{n^{ - 1}}\left( {\frac{1}{n}} \right)\$
B

$Si{n^{ - 1}}\left( {\frac{1}{n}} \right)\$
C

Sin^-1(n)
D

Tan^-1(n)

Solution

$\mu = \tan P \Rightarrow P = {\tan ^{ - 1}}(\mu ) = {\tan ^{ - 1}}(n)\$

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