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 ...

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 the second year ...