Klinger Scientific Franck Hertz Apparatus Argon Gas Set Up

The Franck-Hertz Experiment yields basic evidence for the existence of quantum states. Inside a vacuum tube filled with a trace of argon gas, a beam of electrons is generated and accelerated towards a counterelectrode. A voltage barrier ahead of the counter electrode only allows electrons with a certain minimum energy to get through and make a detectable current. As the accelerating energy is increased, changes in the current are observed. On the way to the counter electrode, the electrons collide with argon atoms. At first, nothing happens, but as the electron energy rises, it reaches enough to give one quantum of energy to the argon to ionize it. Now the electron can’t pass the voltage barrier and the current drops. The multiple valleys in the current curve are evidence of the donations of a quantum of energy.

Requires User Supplied Dual-channel oscilloscope for automatic scan.

 Argon-filled Franck-Hertz tube achieves 5-7 current maxima

• Anode current range 0.1nA—1μA

•Automatic scan to oscilloscope or chart recorder, or manual scan

• Adjustable, stabilized filament, grid, and anode voltages

• 3-1/2 digit voltage and current readouts

 INSTRUCTIONS FOR USE CLICK HERE