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JEE Main 2005 Physics question

PhysicsRay Optics and Optical InstrumentsJEE Main 2005

A fish looking up through the water sees the outside world contained in a circular horizon. If the refractive index of water is and the fish is 12 cm below the surface, the radius of this circle in cm is

Answer: (2)

Solution

The circle's edge corresponds to the critical angle C: , so $ C =

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Question ID VK-038573