19. An electron (mass m) with initial velocity i = voi + voj is in an electric field É = -E,k.If do is initial de-Broglie wavelength of electron, its de-Broglie wavelength at time t is given by a. A = E t2 1+ m²v ,2. b. A= It 1+ m²v c. A = E2 1+; 2m2 d. A = 2+ Eže? t2 m²u
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