question_answer 44)

   An electron (mass m) with an initial velocity is in electric field . It?s de Broglie wavelength at time t is given by (a)                (b) (c)                                     (d)

Answer:

  (a)Initial de-Broglie wavelength of electron,                                                    ? (i) Force on electron in electric field,  Velocity of electron after timer, de-Broglie wavelength associated with electron at time t is                                                                [from(i)]