Uploaded June 2025 | Updated September 2026, 2 days ago
#quantumphysics #FranckHertzExperiment #argon
A DIY version of the Franck-Hertz experiment. Instead of a costly mercury tube, I use a cheap thyratron tube filled with argon. A special power supply was built for the experiment that provides an adjustable accelerating, retarding and filament voltage. The filament current can also be preset. Analog voltmeters and ammeters are integrated into the power supply. You only need a multimeter set in the µA range to measure the collector or anode current. As with the Franck-Hertz experiment, the glowing regions can also be seen, although the design of the tube prevents a direct view.
#quantumphysics #FranckHertzExperiment #argon
A DIY version of the Franck-Hertz experiment. Instead of a costly mercury tube, I use a cheap thyratron tube filled with argon. A special power supply was built for the experiment that provides an adjustable accelerating, retarding and filament voltage. The filament current can also be preset. Analog voltmeters and ammeters are integrated into the power supply. You only need a multimeter set in the µA range to measure the collector or anode current. As with the Franck-Hertz experiment, the glowing regions can also be seen, although the design of the tube prevents a direct view.
