Technical data

Franck-Hertz experiment with a Hg-tube

Article no: P2510311

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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.

Benefits

Experience the essence of the Nobel Price: Franck, Hertz (1925)
Classical Version with Mercury (Hg)
One operating unit for 2 experiments (Hg, Ne)
Precise determination of electron excitation energy of Hg
Direct connection to computer, no extra interface necessary

Tasks

To record the countercurrent strength Ι in a Franck-Hertz tube as a function of the anode voltage U.
To determine the excitation energy E from the positions of the current strength minima or maxima by difference formation.

Learning objectives

Energy quantum
Electron collision
Excitation energy

Scope of delivery

Franck-Hertz control unit	09106-99	1
Franck-Hertz Hg-tube	09105-10	1
Franck-Hertz oven for Hg-tube	09105-93	1
Thermocouple NiCr-Ni, -40..1300°C	13615-01	1
Connecting cord for Franck-Hertz Hg-tube	09105-30	1
Screened cable, BNC, l = 1 m	07542-11	1
Software Measure Franck-Hertz experiment	14522-61	1