A, B and C are three optical media of respective critical angles `C_1`, `C_2` and `C_3`. Total internal reflection of light can occur from A and B and also from B to C but not from C to A. Then the correct relation between critical angles isA. `C_1 gt C_2 gt C_3`B. `C_1=C_2=C_3`C. `C_3 gt C_1 gt C_2`D. `C_1 lt C_2 lt C_3`

A, B and C are three optical media of respective critical angles `C_1`

1.	A, B and C are three optical media of respective critical angles `C_1`, `C_2` and `C_3`. Total internal reflection of light can occur from A and B and also from B to C but not from C to A. Then the correct relation between critical angles isA. `C_1 gt C_2 gt C_3`B. `C_1=C_2=C_3`C. `C_3 gt C_1 gt C_2`D. `C_1 lt C_2 lt C_3`
Answer» Correct Answer - D T.I.R. can occur from A to B i.e. `mu_Agtmu_B`. B to C i.e. `mu_Bgtmu_C` `mu_Agtmu_Bgtmu_C` `sinC=1/muimpliesmu=(1)/(sinC)` `(1)/(sin C_1)gt(1)/(sinC_2)gt(1)/(sinC_3)` `sinC_1 lt sinC_2 lt sinC_3` `C_1 lt C_2 lt C_3`

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