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The speed of light in a mediaM1  and M2  are 1.5×108m/s  and 2×108m/s  respectively. A ray of light enters from mediumM1  to M2  at an incident angle i. If the ray suffers total internal reflection the value of i is

a
i≥sin−1(43)
b
i≥sin−1(32)
c
i≤sin−1(34)
d
i≥sin−1(34)

detailed solution

Correct option is D

μ1=CV1=3×1081.5×108=2           μ2=CV2=3×1082×108=32 Sin c =μ2μ1=34  For TIR  sini≥sinc     ∴i≥sin−1(34)

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