Physics · 2023
JEE Main · 24 January 2023, Shift 2 · Q28
A convex lens of refractive index 1.5 and focal length 18 cm in air is immersed in water. The change in focal length of the lens will be ____ cm.…
A convex lens of refractive index $\displaystyle 1.5$ and focal length $\displaystyle 18$ cm in air is immersed in water. The change in focal length of the lens will be $\displaystyle \_\_\_\_$ cm.
(Given refractive index of water $\displaystyle =\frac{4}{3}$ )
Official answer
From NTA’s final answer key for this paper.
54
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JEE Main 2023 Physics question, with the answer from NTA’s final answer key. Where our answers come from.