STANDARD Physics Total Internal Reflection MCQ Question
A ray of light travelling in a transparent medium of refractive index μ, falls on a surface separating the medium from air at an angle of incidence of 45°. For which of the following value of μ the ray can undergo total internal reflection?
μ = 1.33
μ = 1.40
μ = 1.50
μ = 1.25
Correct Answer
Detailed Explanation
For total internal reflection, sin i > sin C where, i = angle of incidence, C = critical angle. Given i = 45°, μ must be greater than 1/√2. Hence, option (C) is correct.
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