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WBJEE 2020 Physics Solved Paper

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Question : 30

Total: 40

A thin convex lens is placed just above an empty vessel of depth 80 cm. The image of a coin kept at the bottom of the vessel is thus formed 20 cm above the lens. If now water is poured in the vessel up to a height of 64 cm, what will be the approximate new position of the image. Assume that refractive index of water is 4/3.

21.33 cm above the lens
6.67 cm below the lens
33.67 cm above the lens
24 cm above the lens

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