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AMU Medical AMU Solved Paper-2012

  • question_answer
    The wave function (in SI unit) for a light wave is given as \[\Psi (x,t)={{10}^{3}}\sin \pi (3\times {{10}^{6}}x-9\times {{10}^{14}}t)\] The frequency of the wave is equal to

    A)  \[4.54\times {{10}^{14}}Hz\]     

    B)  \[3.5\times {{10}^{14}}Hz\]

    C)  \[3.5\times {{10}^{10}}Hz\]                       

    D)  \[2.5\times {{10}^{10}}Hz\]

    Correct Answer: C

    Solution :

                     The wave function\[\Psi (x,t)={{10}^{3}}\sin \pi (3\times {{10}^{6}}x-9\times {{10}^{4}}t)\] Here, Angular frequency co \[=9\times {{10}^{14}}\pi \]                 \[\omega =2\pi n\]                 \[n=\frac{\omega }{2\pi }=\frac{9\times {{10}^{14}}\pi }{2\pi }=4.5\times {{10}^{14}}Hz\]


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