Principle

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

Tasks


To record the counter current strength I 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

Quantum leap

Electron collision

Excitation energy


Benefits



Fascinating Nobel Prize experiment (Franck-Hertz 1925)


Suitable for demonstration and lab courses as well

Compact neon tube in sturdy casing - ready to use due to short heat-up time

Control unit compatible to Ne and Hg tube

Easy-to-use software for control, data acquisition and evaluation


Software included. Computer not provided.