A convex lens is dipped in a liquid whose refractive index is equal to the refractive index of the lens. Then its focal length will:

Question

A convex lens is dipped in a liquid whose refractive index is equal to the refractive index of the lens. Then its focal length will:, become zero, become infinite, become small, but non-zero, remain unchanged

MARKS App · Accepted Answer

When refractive index of lens is equal to the refractive index of liquid, the lens behave like a plane surface with focal length infinity.

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