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...University of michigan physics advanced laboratory electron diffraction and crystal structure introduction in classical mechanics we describe motion by assigning momenta to point particles quantum learn that the is also described waves with crucial parameters two viewpoints related through de broglie relation h p where momentum wavelength planck s constant j ev observe wave like behavior require some kind grating distance between slits order at typical energies one angstrom cm about same size as interatomic spacings common crystals regular atomic arrays are thus perfectly scaled gratings for creating a matter pattern measuring their verifying eq an added bonus principle verified patterns then become powerful tools study this experiment you will use cathode ray tube graphite target shows on screen verify analyze structures including measurement inter basic principles vs voltage accelerated high v its energy given e m solving substituting into gives evm should yourself can be re written ...