Description: Electron diffraction patterns for single crystal and polycrystalline materials are displayed on a CRT screen. A Welch model 2639 'Electron Diffraction tube' is used in an experiment in ...

Plug in the laser and aim it at the wire, maximizing the intensity and spread of the diffraction pattern. Use a lab jack to elevate the fringe pattern to a screen, if necessary. Repeat step 1 to 3 for ...