Schematic of transverse Zeeman effect
1. Magnet 2. Mercury lamp
3. Condensing lens 4. Filter
5. F-P etalon 6. Polarizer
7. Imaging lens 8. Microscope
Fringes before (left) and after (right) applying magnetic field at 546 nm
Setup for Faraday effect
Setup for longitudinal Zeeman effect
Before and after applying magnetic field at 436 nm (left) and 577 nm (right)
Features
Transverse and longitudinal Zeeman effects
Integrated system for both Faraday and Zeeman effects
High accuracy Teslameter included
Magneto-optic material of large Verdet constant offers significant Faraday effect
Wideband etalon enables oberserving Zeeman effects at other Hg spectral lines
Optional CCD camera with analysis software for Windows 10/11
Introduction
This LEAI-22 experimental system of Faraday and Zeeman effects consists of a main controller unit (including Teslameter, optical power meter, etc.), an electromagnet with a rotation stage, a diode laser, a pencil Mercury lamp, focusing/imaging lenses, an interference optical filter, a F-P etalon, a polarizer, a photodetector, a direct reading microscope with an optional CCD camera, a USB image acquisition box, and analysis software. It is an ideal experimental instrument for advanced physics laboratories.
The instructional 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 the polarization of a Mercury atomic spectral line at 546.1 nm
3. Calculate electron charge/mass ratio based on Zeeman splitting amount
4. Observe Zeeman effect at other Mercury spectral lines (e.g. 577 nm, 436 nm & 404 nm) with optional filters
5. Learn how to adjust a Fabry-Perot etalon and apply a CCD device in spectroscopy
6. Measure magnetic field intensity using a Teslameter, and determine magnetic field distribution
7. Observe Faraday effect, and measure Verdet constant using light extinction method
Specifications
| Item | Specifications |
| Electromagnet | B: ~1300 mT; pole spacing: 8 mm; pole dia: 30 mm: axial aperture: 3 mm; number of turns per coil: 2100 |
| Power supply | 5 A/30 V (max) |
| Diode laser | > 2.5 mW@650 nm; linearly polarized |
| Etalon | dia: 40 mm; L (air)= 2 mm; passband:>100 nm; R=95%; flatness:< λ/30 |
| Teslameter | range: 0-1999 mT; resolution: 1 mT |
| Pencil mercury lamp | emitter diameter: 6.5 mm; power: 3 W |
| Interference optical filter | CWL: 546.1 nm; half passband: 8 nm; aperture: 20 mm |
| Direct reading microscope | magnification: 20 X; range: 8 mm; resolution: 0.01 mm |
| Lenses | collimating: dia 34 mm; imaging: dia 30 mm, f=157 mm |
Parts List
| Description | Qty |
| Main Unit | 1 |
| Diode Laser with Power Supply | 1 set |
| Magneto-Optic Material Sample | 1 |
| Pencil Mercury Lamp | 1 |
| Mercury Lamp Adjustment Arm | 1 |
| Milli-Teslameter Probe | 1 |
| Mechanical Rail | 1 |
| Carrier Slide | 6 |
| Power Supply of Electromagnet | 1 |
| Electromagnet | 1 |
| Condensing Lens with Mount | 1 |
| Interference Filter at 546 nm | 1 |
| F-P Etalon | 1 |
| Polarizer with Scale Disk | 1 |
| Quarter-Wave Plate with Mount | 1 |
| Imaging Lens with Mount | 1 |
| Direct Reading Microscope | 1 |
| Photo Detector | 1 |
| Power Cord | 3 |
| CCD, USB Interface & Software | 1 set (option 1) |
| Interference filters with mount at 577 & 435 nm | 1 set (option 2) |
Schematic of transverse Zeeman effect
1. Magnet 2. Mercury lamp
3. Condensing lens 4. Filter
5. F-P etalon 6. Polarizer
7. Imaging lens 8. Microscope
Fringes before (left) and after (right) applying magnetic field at 546 nm
Setup for Faraday effect
Setup for longitudinal Zeeman effect
Before and after applying magnetic field at 436 nm (left) and 577 nm (right)
