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CET Karnataka Engineering CET - Karnataka Engineering Solved Paper-2004

  • question_answer
    The refractive index of a particular material is 1.67 for blue light, 1.65 for yellow light and 1.63 for red light. The dispersive power of the material is :

    A)  0.031                                   

    B)  1.60

    C)  0.0615                                 

    D)  0.024

    Correct Answer: C

    Solution :

    Dispersive power of material                 \[\omega =\frac{{{\mu }_{B}}-{{\mu }_{R}}}{{{\mu }_{\gamma -1}}}\]                 \[=\frac{1.67-1.63}{1.65-1}\]                 \[=\frac{0.04}{0.65}\]                 \[=0.0615\]


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