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MHT CET 2026 Physics question

PhysicsRay Optics and Optical InstrumentsMHT CET 2026

A lens of refractive index '' has focal length 'f'. When the lens is immersed in a liquid of refractive index its focal length becomes '' Then '' is given by

Answer: (D)

Solution

In air, the lens-maker's formula gives . In the liquid the relative refractive index is , so . Dividing, $ =

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Question ID VK-100063