Question:medium
On a hypotenuse of a right prism (30^∘-60^∘-90^∘) of refractive index 1.50, a drop of liquid is placed as shown in figure. Light is allowed to fall normally on the short face of the prism. In order that the ray of light may get totally reflected, the maximum value of refractive index of the liquid is
On a hypotenuse of a right prism (30^∘-60^∘-90^∘) of refractive index 1.50, a drop of liquid is placed as shown in figure. Light is allowed to fall normally on the short face of the prism. In order that the ray of light may get totally reflected, the maximum value of refractive index of the liquid is
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For total internal reflection:
n₂ ≤ n₁ sin i
Maximum refractive index of the outer medium occurs when i = c.
Updated On: Mar 19, 2026
- 1.30
- 1.47
- 1.20
- 1.25
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The Correct Option is B
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