As early as 1914, James Franck and Gustav Hertz discovered in the course of their investigations an energy loss in distinct steps for electrons passing through mercury vapor and a corresponding emission at the ultraviolet line of mercury.
- 1x Franck-Hertz Tube Enclosure with Argon Tube
- 1x DC Power Supply I (Constant Voltage)
- 1x DC Power Supply II (Constant Voltage)
- 1x DC Current Amplifier
- 1x Red and Black Patch Cords
- 2x Interface Cables