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JAMIA MILLIA ISLAMIA Jamia Millia Islamia Solved Paper-2008

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


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