PHYWE Exhibition Area

Electron Diffraction

To demonstrate the Wave Nature of the Electron and to determine the Lattice Constant of Graphite

Bragg reflection at the various lattice planes of the graphite crystallites
Due to their wave nature the electrons can thereafter interfere constructively
Concentric interference rings (Debye-Scherrer rings) on the screen
Determination of the lattice constant of graphite with the aid of the diameter of the diffraction rings

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