A ray of light travelling in a transparent medium of refractive index µ, falls on surface

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A ray of light travelling in a transparent medium of refractive index µ, falls on surface seperating the medium from air at an angle of incidence of 45⁰. For which of the following value of µ the ray can undergo total internal reflection?

Options

(a) µ = 1.33
(b) µ = 1.40
(c) µ = 1.50
(d) µ = 1.25

Correct Answer:

µ = 1.50

Explanation:

For the initial reflection,
µ >= 1 / sin C >= √2 >= 1.414
µ = 1.50

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Topics: Ray Optics (94)
Subject: Physics (2479)

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