An electron is released from rest and allowed to accelerate through a potential…
PHYSICS · Subjective · A Level · Physics · Particles and radiation · Particles and radiation
Problem
An electron is released from rest and allowed to accelerate through a potential difference of 54V.
(i) Calculate the de Broglie wavelength of the electron after acceleration.
(ii) Electromagnetic radiation having the same numerical wavelength lies in which region of the electromagnetic spectrum?
(iii) If the accelerating potential difference is made four times larger, what will be the new de Broglie wavelength of the electron expressed as a simple multiple or fraction of the original value?