A glass prism ABC (refractive index 1.5), immersed in water (refractive index 4/3). A ray of light is incident normally on face A B . If it is totally reflected at face A C then

Question

A glass prism ABC (refractive index 1.5), immersed in water (refractive index 4/3). A ray of light is incident normally on face A B . If it is totally reflected at face A C then, sin ⁡ θ ≥ 8 9, sin ⁡ θ ≥ 2 3, sin ⁡ θ = 3 2, 2 3 sin ⁡ θ 8 9

MARKS App · Accepted Answer

For total internal reflection at A C face sin ⁡ i ≥ μ w u g sin ⁡ θ ≥ 4 3 × 1.5 sin ⁡ θ ≥ 8 9

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