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JCECE Medical JCECE Medical Solved Paper-2009

  • question_answer
    An unpolarised beam of intensity \[{{\text{I}}_{\text{o}}}\]is incident on a pair of nicols making an angle of \[{{60}^{o}}\] with each other. The intensity of light emerging from the pair is

    A)  \[{{I}_{o}}\]

    B)  \[\frac{{{I}_{o}}}{2}\]

    C)  \[\frac{{{I}_{o}}}{4}\]

    D)  \[\frac{{{I}_{o}}}{8}\]

    Correct Answer: C

    Solution :

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


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