Question

33. A ray of light travelling in a transparent medium of
refractive index u, falls on a surface separating the
medium from air at an angle of incidence of 45°. For
which of the following value of u the ray can undergo
total internal reflection?
[AIPMT (Prelims)-2010]
(1) u = 1.25
(2) u = 1.33
(3) u = 1.40
(4) u = 1.50​

Answer 1

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Answer 2

Answer:

(3) u=1.40

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