For an electron to be maximally diffracted by a crystal, its wavelength must be equal to the spacing of the crystal’s planes. For a separation between planes of 0.250 nm, find the potential difference through which an electron must be accelerated from rest if it is to be maximally diffracted by these planes.
Experiments are performed with ultracold neutrons having velocities as small as 1.00 m/s.
Find the wavelength of such a neutron.
Find the kinetic energy of such a neutron.