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CET Karnataka Medical CET - Karnataka Medical Solved Paper-2006

  • question_answer
    An unpolarised beam of intensity I0 is incident on a pair of nicols making an angle of 60° with each other. The intensity of light emerging from the pair is:

    A)  \[{{I}_{0}}\]

    B)  \[{{I}_{0}}/2\]

    C)  \[{{I}_{0}}/4\]

    D)  \[{{I}_{0}}/8\]

    Correct Answer: C

    Solution :

    According to Malus law \[I={{I}_{0}}{{\cos }^{2}}\theta \] \[={{I}_{0}}({{\cos }^{2}}{{60}^{o}})\] \[={{I}_{0}}{{\left( \frac{1}{2} \right)}^{2}}\] \[=\frac{{{I}_{0}}}{4}\]


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