How do you verify experimentally that the focal length ofa convex lens is increased when it is kept in water?
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Procedure : i) Take a cylindrical glass tumbler whose height is much greater than the focal length of the lens and fill it with water. ii) Keep a black stone at the bottom of the vessel. ... vii) From this we conclude that the focal length of a convex lens is increased when it is kept in water.
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Procedure : i) Take a cylindrical glass tumbler whose height is much greater than the focal length of the lens and fill it with water. ii) Keep a black stone at the bottom of the vessel. ... vii) From this we conclude that the focal length of a convex lens is increased when it is kept in water.