Experiment Zeeman Effect

Discover the origin of the Nobel Prize: Zeeman (1902). Normal and abnormal Zeeman effect with one and the same installation. The electromagnet ensures a fine variation of the magnetic field necessary for calculations or measurements. The high-precision Fabry-Pérot Interferometer provides good results. Image analysis is carried out by specific capture and analysis software.

Subjects discussed :
- Bohr atomic model
- Quantification of energy levels
- Electron spin
- Bohr magneton
- Fabry-Pérot interferometer

Principles and objectives :
The Zeeman effect corresponds to the splitting of the spectral lines of atoms in a magnetic field. The simplest is the division of a spectral line into three components, called the "normal Zeeman effect". In the proposed experiments, the normal Zeeman effect and the abnormal Zeeman effect are studied using a cadmium spectral lamp. The cadmium lamp is subjected to different magnetic flux densities and the separation of the cadmium lines (normal Zeeman effect 643.8 nm, red light; abnormal Zeeman effect 508.6 nm, green light) is studied using a Fabry-Perot interferometer. The evaluation of the results leads to a fairly precise value of the Bohr magneton.

Composition :
- Fabry-Pérot interferometer
- Cd spectral lamp for Zeeman effect / Power supply for spectral lamp
- Electromagnet without pole pieces / Drilled conical pole pieces / rotating plate
- Turntable for heavy goods vehicles
- PHYWE adjustable transformer with digital display DC: 0...20 V, 12 A / AC: 0...25 V, 12 A
- 22,000 µF electrolytic capacitor
- Digital multimeter with thermocouple
- Optical bench, l = 1000 mm / Adjustable foot for optical bench / Slider for optical bench, h = 80 mm
- Component support / - Iris diaphragm diam. 2- 28mm
- Glass lenses, biconvex, f = + 300 mm / f = + 50 mm
- Polarizer on rod / Polarizing preparation, quarter-wave mica / rotating universal support
- Connection wires, 32 A, 250 mm / 32 A, 500 mm / 32 A, 750 mm / 32 A, 1000 mm
- 1.3 Mpx USB digital camera / Camera support
- 12mm camera lens
- Screw set