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JEE Main & Advanced Physics Question Bank Prism Theory and Dispersion of Light

  • question_answer
    Two lenses having \[{{f}_{1}}:{{f}_{2}}=2:3\] has combination to make no dispersion. Find the ratio of dispersive power of glasses used                                                                    [RPMT 1997]

    A)            2 :  3                                         

    B)            3 : 2

    C)            4 : 9                                          

    D)            9 : 4

    Correct Answer: A

    Solution :

               \[\frac{{{\omega }_{1}}}{{{\omega }_{2}}}=-\frac{{{f}_{1}}}{{{f}_{2}}}=-\frac{2}{3}\].


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