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JEE Main & Advanced Chemistry Structure of Atom / परमाणु संरचना Question Bank Self Evaluation Test - Structure of Atom

  • question_answer
    The number of photons of light having wave number 'x' in 10 J of energy source is:

    A) \[10hcx\]                       

    B) \[\frac{hc}{10x}\]

    C) \[\frac{10}{hcx}\]      

    D) None of these

    Correct Answer: C

    Solution :

    [c]  \[E=\frac{nhc}{\lambda }=nhc\overline{v}\left( \because \,\overline{v}=\frac{1}{\lambda } \right)\] \[\therefore 10=nhc\overline{v}\,\] or \[n=\frac{10}{hc\overline{v}}=\frac{10}{hcx}\]               


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