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JEE Main & Advanced Physics Ray Optics Question Bank Critical Thinking

  • question_answer
    Which one of the following spherical lenses does not exhibit dispersion?  The radii of curvature of the surfaces of the lenses are as given in the diagrams [IIT-JEE (Screening) 2002]

    A)                                             

    B)

    C)                                              

    D)

    Correct Answer: C

    Solution :

               The dispersion produced by a spherical surface depends on it?s radius of curvature. Hence, a lens will not exhibit dispersion only if it?s two surfaces have equal radii, with one being convex and the other concave.


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