A convex lens is dipped in a liquid whose refractive index is equal to the refractive…
Physics · Class 12 · CBSE — Ray Optics & Optical Instruments
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
Answer
(B) become infinite
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