A glass prism of refractive index 1.5 is immersed in water of refractive index 4/3. A light ray incident normally on face AB is totally reflected at face AC if
A
sinθ>8/9
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B
sinθ<2/3
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C
sinθ=√3/2
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D
2/3<sinθ≤8/9
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Solution
The correct option is Asinθ>8/9
For total internal reflection to occur the angle of incidence should be more than the critical angle.