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IIT JEE Advanced 2012 Paper 1

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Question : 3

Total: 60

A biconvex lens is formed with two planoconvex lenses as shown in the figure. Refractive index n of the first lens is 1.5 and that of the second lens is 1.2. Both curved surface are of the same radius of curvature R = 14 cm. For this biconvex lens, foran object distance of 40 cm, the image distance will be

–280.0 cm
40.0 cm
21.5 cm
13.3 cm

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