An electron beam is accelerated through a potential difference of 100V and made to fall on a nickel crystal whose inter-planar spacing is d=0.091nm. Assume first-order reflection from the crystal planes.
(i) Calculate the de Broglie wavelength of the electrons.
(ii) Using an appropriate condition for diffraction, determine whether a strong reflected maximum can appear close to a glancing angle of 20∘. Show all working and justify your conclusion.