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AMU Medical AMU Solved Paper-2011

  • question_answer
    A transparent thin plate of a polaroid is placed on another similar plate such that the angle between their axes is 30°. The intensities of the emergent and the unpolarised incident light will be in the ratio of

    A)  1 : 4                                      

    B)  1 : 3

    C)  3 : 4                                      

    D)  3 : 8

    Correct Answer: D

    Solution :

                                    \[\frac{I}{{{I}_{0}}/2}={{\cos }^{2}}\theta \]                 \[\frac{I}{{{I}_{0}}/2}={{\cos }^{2}}{{30}^{o}}={{\left( \frac{\sqrt{3}}{2} \right)}^{2}}=\frac{3}{4}\]                 \[\frac{I}{{{I}_{0}}}=\frac{3}{8}\]              


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