NEET Physics (general) MCQ Question
Consider a convex lens partially submerged in a liquid with a refractive index equal to that of the lens. Which of the following describes the behavior of the lens in this setup?
The lens acts like a plane sheet of glass.
The lens continues to converge light strongly.
The lens diverges light like a concave lens.
The lens becomes opaque and reflects all light.
Correct Answer
Detailed Explanation
When the refractive index of the lens matches that of the surrounding liquid, the lens effectively disappears and acts like a plane sheet of glass, as the focal length becomes infinite.
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