1.

The refractive index of the material of a double convex lens is 1.5 and its focal length is 5 cm. If the radius of curvatures of faces are equal then the value of its radius. of curvature is (1) 5 cm (2) 6.5 cm (3) 8 cm (4) 9.5 cm

Answer»

Correct option is  (1) 5 cm



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