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Refractive Index of a Prism

A prism of re...

Question

A prism of refracting angle $30^{o}$ is closed with a thin film of transparent material of refractive index 2.2 on face AC of the prism. A light of wavelength 6600 A is incident on face AB such that angle of incidence is $60^{o}$ Find.
(a) the angle of emergence

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Solution

Snell’s law-

$1 \times sin 60^{0} = \sqrt{3} sin r_{1}$

$r_{1} = 30^{0}$

$A = r_{1} + r_{2}$

$r_{2} = 0^{0}, i_{2} = 0^{0}$

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