electron diraction lab measuring interatomic distances between scattering planes 1 dr darrel smith physics department embry riddle aeronautical university dated 14 april 2017 the purpose of this lab is twofold ...
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...Electron diraction lab measuring interatomic distances between scattering planes dr darrel smith physics department embry riddle aeronautical university dated april the purpose of this is twofold rst objective to demonstrate wavelike properties an namely debroglie wavelength second use these determine interplanar spacing in a polycrystalline graphite lattice monoener getic electrons are directed at target having random orientations two primary labelled d and bragg beam elastic occurs for crystals when their proper orientation angle various accelerating voltages can be t spacings i background ii theory german physicist max von laue suggested theprinciplebehindelectrondiractionisthatabeam that regularly spaced atoms crystal separated by monoenergetic act like electromagnetic nmcouldbeusedasadiractiongratingforx rays waves e x they interact with surface diract was developed particular experiment w l his father h dirac hexagonally shaped shown fig tion discussed your textbook modern rd as ...