The angle of incidence at which the polarisation of light reflected from the surface of glass is $58^{o}$ then refractive index of glass is _________.

1.9

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1.8

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1.7

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1.6

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Solution

The correct option is A $1.6$
Brewster's angle is an angle of incidence at which light with a particular polarization is perfectly transmitted through a transparent dielectric surface, with no reflection.
The Brewster's angle is given as
$i = t a n^{- 1} (\frac{n_{2}}{n_{1}})$
$⟹ 58^{\circ} = t a n^{- 1} (\frac{μ}{1})$
$⟹ μ = t a n 58^{\circ}$
$= 1.6$

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The angle of incidence at which the polarisation of light reflected from the surface of glass is 58o then refractive index of glass is _________.

The correct option is A 1.6Brewster's angle is an angle of incidence at which light with a particular polarization is perfectly transmitted through a transparent dielectric surface, with no reflection.The Brewster's angle is given asi=tan−1(n2n1) ⟹58∘=tan−1(μ1)⟹μ=tan58∘=1.6

The angle of incidence at which the polarisation of light reflected from the surface of glass is $58^{o}$ then refractive index of glass is _________.