question_answer 48)

  The de Broglie wavelength of a photon is  twice the de Broglie wavelength of an electron. The  speed of the electron is .Then (a)                      (b) (c)                     (d)

Answer:

  For electron,                                                                         ?(i) Kinetic energy. or ...(ii) For photon of wavelength , energy                 For electron,   Thus options (b) and (c) are correct.