1.

A radii of curvature of two faces of a biconvex lens of refractive index are in the ratio of 2:3. The focal length of the lens is 12 cm. The radius of curvature of the surface with low value of radius of curvature is… (1) 5 cm (2) 10 cm (3) 15 cm (4) 20 cm

Answer»

Correct option is (2) 10 cm



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