Physics Lab Equipment

LEAI-20 Zeeman Effect Apparatus with Permanent Magnet

LEAI-20 Zeeman Effect Apparatus with Permanent Magnet


  • Permanent magnet for high intensity and stable magnetic field

  • Variable magnetic field intensity through spacing adjustment of poles

  • High accuracy Teslameter included

  • Optional CCD and software for Windows 10/11


This LEAI-20 experimental system of Zeeman effect with permanent magnet consists of a main unit (including Teslameter, light source power supply, etc.), a permanent magnet, a pencil Mercury lamp, focusing/imaging lenses, an interference optical filter, a F-P etalon, a polarizer, a direct reading microscope, a CCD camera (optional), a USB image acquisition box (optional), and analysis software (optional). It is an ideal experimental instrument for advanced physics laboratories.

The instruction manual contains comprehensive materials including experimental configurations, principles and step-by-step instructions. Please click Experiment Theory and Contents to find more information about this apparatus.


Using this instrument, the following experiments can be conducted:


1. Observe Zeeman effect, and understand atomic magnetic moment and spatial quantization

2. Observe the splitting and polarization of a Mercury atomic spectral line at 546.1 nm

3. Calculate the Bohr magneton based on Zeeman splitting amount

4. Learn how to adjust a Fabry-Perot etalon and apply a CCD device in spectroscopy


Permanent magnetintensity: 1360 mT; pole spacing: > 7 mm (adjustable)
Etalondia: 40 mm; L (air): 2 mm; passband:>100 nm; R= 95%; flatness < λ/30
Teslameterrange: 0-1999 mT; resolution: 1 mT
Pencil mercury lampemitter diameter: 7 mm; power: 3 W
Interference optical filterCWL: 546.1 nm; half passband: 8 nm; aperture: 19 mm
Direct reading microscopemagnification: 20 X; range: 8 mm; resolution: 0.01 mm
Lensescollimating: dia 34 mm; imaging: dia 30 mm, f=157 mm

Parts List

Main Unit1
Pencil Mercury Lamp1
Milli-Teslameter Probe1
Mechanical Rail1
Carrier Slide3
Collimating Lens1
Interference Filter1
F-P Etalon1
Imaging Lens1
Direct Reading Microscope1
Power Cord1
CCD, USB Interface & Software1 set (optional)

20160112-085424729724.pngSchematic of experimental setup

   1. Magnet   

   2. Mercury lamp

   3. Condensing lens  

   4. Filter 

   5. Polarizer  

   6. F-P etalon

   7. Imaging lens  

   8. Microscope

LEAI-20 Zeeman Effect-1.jpg

Fringes after applying magnetic field

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