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CET Karnataka Medical CET - Karnataka Medical Solved Paper-2006

  • question_answer
    White light is incident on one of the refracting surfaces of a prism of angle \[5{}^\circ \]. If the refractive indices for red and blue colours are 1.641 and 1.659 respectively, the angular separation between these two colours when they emerge out of the prism is:

    A) \[0.9{}^\circ \]

    B)  \[0.09{}^\circ \]

    C) \[1.8{}^\circ \]

    D)  \[1.2{}^\circ \]

    Correct Answer: B

    Solution :

    Angular dispersion, \[{{\delta }_{b}}-{{\delta }_{r}}=({{\mu }_{b}}-{{\mu }_{r}})A\] \[=(1.659-1.641){{5}^{o}}\] \[={{0.09}^{o}}\]


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