If the critical angle for total internal reflection from a medium to vacuum is 45°, then velocity of light in the medium is, (a) 3 × 10⁸ m/s (b) 1.5 × 10⁸ m/s (c) 3/√(2) × 10⁸ m/s (d) √(2) × 10⁸ m/s

Answer: (c). μ = (1)/(sin C) = (1)/(sin 45°) = √(2). v = c/μ = (3 × 10⁸)/(√(2)) m/s So the answer is (c) 3/√(2) × 10⁸ m/s.

If the critical angle for total internal reflection from a medium to… | NEET 2020 (Phase 2)

Q36NEET 2020 · PHASE 2Easy

Total Internal Reflection

If the critical angle for total internal reflection from a medium to vacuum is $45^\circ$ , then velocity of light in the medium is,

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Answer: (c)

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