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Gupta Ravi
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Asked: 2025-01-04T09:24:31+00:00 In:

A convex lens is held in water. What change, if any, do you expect in its focal length?

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Focal length of the given lens increases in accordance with lens maker’s formula
1/f =(n-1)(1/R1 -1/R2) because Ngw <nga.
Class 12 Physics
Chapter 9 Ray Optics and Optical Instruments Session 2024-2025.

a convex lens is held in water change expect in its focal lengthclass 12 physicsshort answer questions
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    1. When a convex lens is held in water, its focal length increases. Since water has a higher refractive index than air, the refractive power of the lens decreases, resulting in a longer focal length compared to its value in air.

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      https://www.tiwariacademy.com/ncert-solutions/class-12/physics/chapter-9/

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