NEET Sample Paper NEET Sample Test Paper-9

  • question_answer What is the frequency of a x-ray photon whose momentum is \[1.1\times {{10}^{-23}}kg\,\,m{{s}^{-2}}\]?

    A)  \[5\times {{10}^{16}}hz\]              

    B)  \[1.5\times {{10}^{27}}hz\]

    C)  \[0.5\times {{10}^{18}}hz\]               

    D)  \[5\times {{10}^{18}}hz\]

    Correct Answer: B

    Solution :

    \[E=m{{c}^{2}}\] \[E=h\upsilon \] \[m{{c}^{2}}=h\upsilon \]                 \[\upsilon =\frac{m{{c}^{2}}}{h}=\frac{1.1\times {{10}^{-23}}\times {{(3\times {{10}^{8}})}^{2}}}{6.6\times {{10}^{-34}}}\]                                 \[=1.5\times {{10}^{27}}{{h}_{z}}\]

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