Physics Lab Equipment

LEAI-21 Zeeman Effect Apparatus with Electromagnet

LEAI-21 Zeeman Effect Apparatus with Electromagnet


  • Adjustable magnetic field intensity from electromagnet

  • High accuracy Teslameter included

  • Optional CCD and software for Windows 7/8/10, 32/64-bit computers


This LEAI-21 experimental system of Zeeman effect with electromagnet consists of a main machine unit (including Teslameter, light source power supply, etc.), an electromagnet, a pencil Mercury lamp, focusing/imaging lenses, an interference optical filter, a F-P etalon, a polarizer, a direct reading microscope, an optional CCD camera, an optional USB image acquisition box, and analysis software (optional).  In addition, the relatively wideband etalon allows the observation of Zeeman effect at other Mercury spectral lines of 577 nm and 436 nm with an optional set of filters. 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 electron charge-mass ratio based on Zeeman splitting amount

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


Electromagnetintensity: >1000 mT; pole spacing: 7 mm; dia 30 mm
Power supply of electromagnet5 A/30 V (max)
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: 6.5 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 Slide6
Power Supply of Electromagnet1
Collimating Lens1
Interference Filter1
F-P Etalon1
Imaging Lens1
Direct Reading Microscope1
Power Cord1
Instruction Manual1
CCD, USB Interface & Software1 set (optional)

      Fringes after applying magnetic field.jpg

Fringes after applying magnetic field LEAI-21-4.jpg

Use software to process fringes

LEAI-26-436-no.jpg LEAI-26-436.jpg

Before and after applying magnetic field at 436 nm

LEAI-26-577-no.jpg LEAI-26-577.jpg

Before and after applying magnetic field at 577 nm

Copyright © Lambda Scientific Systems, Inc. 2010-2021. All rights reserved.