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A, B and C are three optical media of respective critical angles C₁, C₂, and C₃. Total internal reflection of light can occur from A to B and also from B to C but not from C to A. Then the correct relation between critical angles is

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C₁ > C₂ > C₃

C₁ < C₂ < C₃

C₃ > C₁ > C₂

C₁ = C₂ = C₃

answer is D.

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Detailed Solution

As total internal reflection takes place from A to B

similarly

But as total internal reflection cant take place from C to A

$μ_{C} < μ_{A} - - - (3)$

From (1) and (2) and (3)

$\sin c = \frac{1}{μ}$

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