Consider the de broglie wavelength of an electron that strikes the back face of one of the early models of a tv screen at 1/10 the speed of light. find the electron wavelength.

Explanation:

The De Broglie wavelength of a particle is given by

(1)

where

h is the Planck constant

p is the momentum of the particle

For the electron in this problem, which is relativistic, the momentum is given by

(2)

where:

is the relativistic factor

is the rest mass of the electron

is the speed of the electron

Substituting into (2), we find

and substituting into (1), we find the wavelength of the electron