JEE Main & Advanced Physics Photo Electric Effect, X- Rays & Matter Waves Question Bank Photon and Photoelectric Effect

  • question_answer
    Momentum of a photon of wavelength l is [CBSE PMT 1993; JIPMER 2001, 02]

    A)            \[\frac{h}{\lambda }\]      

    B)            Zero

    C)            \[\frac{h\lambda }{{{c}^{2}}}\]                                        

    D)            \[\frac{h\lambda }{c}\]

    Correct Answer: A

    Solution :

               Since \[h\nu =m{{c}^{2}}\], hence \[p=mc=\frac{h\nu }{c}=\frac{h}{\lambda }\]


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