AMU Medical AMU Solved Paper-2007

  • question_answer
    The intensity of a plane electromagnetic wave is \[\text{5W}/{{\text{m}}^{\text{2}}}.\] It is incident on a perfectly reflecting surface. Find the radiation pressure.

    A)  \[3.33\times {{10}^{-9}}N/{{m}^{2}}\]  

    B)  \[3.33\times {{10}^{-8}}N/{{m}^{2}}\]

    C)  \[8.0\times {{10}^{-8}}N/{{m}^{2}}\]     

    D)  \[8.0\times {{10}^{-9}}N/{{m}^{2}}\]

    Correct Answer: B

    Solution :

                     The radiation pressure                 \[p\frac{2S}{c}\]                 \[=\frac{2\times 5}{3\times {{10}^{8}}}\]                 \[=3.33\times {{10}^{-8}}N/{{m}^{2}}\]


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