Ray Optics

JEE Main level, single correct, medium

120 of 295

Question 120 of 295

A fish looking up through the water sees the outside world contained in a circular horizon. If the refractive index of water is 4/34 / 3 and the fish is 12 cm12 \mathrm{~cm} below the surface, the radius of this circle in cm\mathrm{cm} is

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Answer: (B) 36/736 / \sqrt{7}

r=hμ2−1=367r=\frac{h}{\sqrt{\mu^2-1}}=\frac{36}{\sqrt{7}}

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JEE Main 2025 Apr 2 Shift 1 question paper

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