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Q.

A, B and C are three optical media of respective critical anglesC1,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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a

C1> C2> C3

b

C3> C1> C2

c

C1< C2< C3

d

C1= C2= C3

answer is D.

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Detailed Solution

A is denser than B and B is denser than C.sinC1=1μ1  ,  sinC2=1μ2  ,  sinC3=1μ3

We can have 1μ1 <1μ2  <1μ3

∴μ1>μ2>μ3

∴C1<C2<C3

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