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AFMC AFMC Solved Paper-2008

  • question_answer
    An unpolarised beam of intensity \[{{I}_{0}}\] is ncident on a pair of nicols making an angle of \[60{}^\circ \] 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 \[I={{I}_{0}}{{\cos }^{2}}\theta \] \[={{I}_{0}}\times {{\left( \frac{1}{2} \right)}^{2}}\] \[=\frac{{{I}_{0}}}{4}\]


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