7A60.10-Electron Diffraction

7a6010electron diffraction

Video: Watch this demo

Instructor video

Description: This apparatus is used to show the diffraction patterns of an electron beam.


  • Electron Diffraction apparatus
  • (Optional) Video camera

Setup Procedure:

  1. Turn the power supply on and check that the electron beam is visible on the screen.
  2. (Optional) Setup a video camera on the diffraction screen for large classes.

Demonstration Procedure:

  1. Turn on the Electron diffraction apparatus.
  2. Wait for the beam to show up.
  3. Using the vertical and horizontal control knobs, move the electron beam until you notice a diffraction pattern. This may take a little guess work.
  4. This demo can produce three different diffraction patterns (see above pictures). This shows that an electron beam can exhibit diffraction patterns much like E&M waves.
  5. Make slight adjustments to the intensity knob to obtain a good picture.
  6. Do not leave the apparatus on for long periods of time.
  7. When finished, turn off the Diffraction tube.

Note: This apparatus is heavy, and the weight is near the front screen.