Haryana PMT Haryana PMT Solved Paper-2009

  • question_answer
    The photons in a radio wave of wavelength \[3\times {{10}^{4}}cm\] have energy

    A)  \[6.62\times {{10}^{-}}^{10}J\]                 

    B)  \[19.86\times {{10}^{-}}^{24}J\]

    C)  \[6.62\times {{10}^{-}}^{28}J\]                                 

    D)  \[2.2\times {{10}^{-}}^{35}J\]

    Correct Answer: C

    Solution :

                     Energy of photon, \[E=\frac{hc}{\lambda }\] \[=\frac{6.6\times {{10}^{-34}}\times 3\times {{10}^{8}}}{3\times {{10}^{2}}}\] \[=6.6\times {{10}^{-28}}J\]


You need to login to perform this action.
You will be redirected in 3 sec spinner