PHYWE Quecksilber Franck-Hertz Röhre Typ 9056
Mercury Franck-Hertz Tube
Tube de Franck-Hertz au mercure

Phywe, Physikalische Werkstätten A.G., Göttingen (Germany).

In 1913/1914 J. Franck and G. Hertz investigated the excitation of gas atoms by electron impacts in a gas discharge tube. They chose mercury as the gas, as it evaporates at a low temperature and the gas pressure in the tube can be adjusted very easily.

Principle: Electrons are accelerated in a tube filled with mercury vapour. The excitation energy of mercury is determined from the distance between the equidistant minima of the electron current in a variable opposing electric field.

This lamp must be installed in a Phywe instrument, where it is covered by a heating element.
5 ohm resistor adjustable in filament power supply.

Documentation: PHYWE - Franck-Hertz experiment.

 

Hauteur • Height • Höhe : 158 mm • 6" 1/4
Diamètre • Diameter • Durchmesser : 40 mm • 1" 5/8

 

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