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JAMIA MILLIA ISLAMIA Jamia Millia Islamia Solved Paper-2004

  • question_answer
        The power of an achromatic convergent lens of two lenses is + 2D. The power of convex lens is +5D. The ratio of dispersive power of convex and concave lenses will be :

    A)  5 : 3                                      

    B)  3:5

    C)  2:5                                        

    D)  5 : 2

    Correct Answer: B

    Solution :

                    Here : \[\Delta H<\Delta E\]and \[\Delta H=\Delta E\] So,          \[\Delta H=0\] For an achromatic combination \[\Delta H>\Delta E\] Or           \[{{\text{K}}_{\text{4}}}\left[ \text{Fe}{{\left( \text{CN} \right)}_{\text{6}}} \right]\] \[\text{CuS}{{\text{O}}_{\text{4}}}\text{+}\]


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