Franck-Hertz eksperiment Hg-rør PHYWE

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

1. To record the countercurrent strength Ι in a Franck-Hertz tube as a function of the anode voltage U.
2. 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

Sættet indeholder:
1 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