VMMC VMMC Medical Solved Paper-2014

  • question_answer
    The mass of a photon with wavelength 3.6 Å is

    A) \[6.135\times {{10}^{-29}}kg\]  

    B) \[6.135\times {{10}^{-33}}kg\]

    C) \[3.60\times {{10}^{-29}}kg\]     

    D) \[3.60\times {{10}^{-27}}kg\]

    Correct Answer: C

    Solution :

    \[E=m{{c}^{2}}=\frac{hc}{\lambda }\]or\[\lambda =\frac{h}{mc}\] \[m=\frac{h}{\lambda c}=\frac{6.62\times {{10}^{-34}}}{3.6\times {{10}^{-10}}\times 3\times {{10}^{8}}}\] \[=6.135\times {{10}^{-33}}kg\]


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