A simple cathode ray tube. In order to determine the nature of cathode rays, experimenters like Arthur Schuster, J. J. Thomson, Heinrich Hertz, and Philipp Lenard would devise many variations on this simple design.

Tube drawing: Copyright 1923 by Central Scientific Company. Glow photo: University of Illinois Urbana-Champaign.

You can EXIT to see more about cathode ray tubes (from U. Illinois Chemistry Learning Center)

1997- American Institute of Physics