An electron (mass m) with an initial velocity is in an electric field . It’s de Broglie wavelength at time t is given by

An electron (mass m) with an initial velocity is in an electric field . It’s de Broglie wavelength at time t is given by

A Moving wave particle's associated with the de Broglie wavelength

According to the de-Broglie wavelength

Initial de-Broglie wavelength

-------------(i)

Acceleration of electron

Velocity after time t

So,

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