Question

What is the de Broglie wave length of an electron, which is accelerated from the rest, through a potential difference of 100V?

Answer 1

For an electron with KE = 1 eV and rest mass energy 0.511 MeV, the associated DeBroglie wavelength is 1.23 nm, about a thousand times smaller than a 1 eV photon. (This is why the limiting resolution of an electronmicroscope is much higher than that of an optical microscope.

Answer 2

1.2 A°...............