AIPMT PRELIMS2003Physics-Optics
AIPMT PRELIMS 2003 Physics Lens MCQ Question
Type: MCQ-conceptual-Medium-Class 12
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
A
Become zero
B
Become infinite
C
Become small, but non-zero
D
Remain unchanged
Correct Answer
Option B
Detailed Explanation
When the refractive index of the lens and the surrounding medium are the same, the lens behaves as if it is not present, leading to an infinite focal length.
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