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JEE Advanced Model Paper 17 with solutions for online practice

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Question : 10

Total: 60

The maximum thickness of a plano convex lens, when viewed normally through the planesurface, appears to be 6 cm and when viewed normally through the curved surface appears tobe 7.2 cm. The actual maximum thickness is 9 cm. Then

The radius of curvature of lens is 18 cm
the refractive index of material of lens is 1.5
The focal length of the lens when its plane surface is silvered is 22 cm
the focal length of the lens when its curved surface is silvered is 8 cm

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