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.


What you can learn about


Energy quantum

Electron collision

Excitation energy


Software included. Computer not provided.