The dispersive power of the material of a lens is 0.04 and the focal length of the…

PHYSICS · Single correct · CBSE · Physics · Ray Optics and Optical Instruments · Ray Optics and Optical Instruments

Problem

The dispersive power of the material of a lens is 0.04 and the focal length of the lens is 10 cm. Then the difference in the focal length of the lens for violet and red colour is: (a) 1 mm (b) 2 mm (c) 3 mm (d) 4 mm

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