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JEE Main20203 Sep 2020Morning ShiftPhysicsRay OpticsActual

An observer can see through a small hole on the side of a jar (radius 15 cm ) at a point at height of 15 cm from the bottom (see figure). The hole is at a height of 45 cm . When the jar is filled with a liquid up to a height of 30 cm the same observer can see the edge at the bottom of the jar. If the refractive index of the liquid is N 100 , where N is an integer, the value of N is

Correct answer

0

Step-by-step solution

From Shell's Law μ × sini = 1 × sinr μ × 15 15 2 + 30 2 = 1 × sin 45 ° μ = 5 2 = 158 × 10 - 2

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