In the Davisson-Germer experiment (Section 28.2), the electrons were accelerated through a 54.0-V potential difference before striking the target.
(a) Find the de Broglie wavelength of the electrons.
(b) Bragg plane spacings for nickel were known at the time; they had been determined through x-ray diffraction studies. The largest plane spacing (which gives the largest intensity diffraction maxima) in nickel is 0.091 nm. Using Bragg's law [Eq. (25-15)], find the Bragg angle for the first-order maximum using the de Broglie wavelength of the electrons.
(c) Does this agree with the observed maximum at a scattering angle of 130°?