A convex lens is dipped in a liquid whose refractive index is equal to the refractive index of the lens.…
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
Solution
When refractive index of lens is equal to the refractive index of liquid, the lens behave like a plane surface with focal length infinity.
Asked in: NEET 2003
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