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PHYWE Zeeman Effect |
Learn about ...
- Bohr’s atomic model
- Quantization of energy levels
- Electron spin
- Bohr’s magneton
- Interference of electromagnetic waves
- Fabry-Perot interferometer
The Zeeman effect is the splitting up of the spectral lines of atoms within a magnetic field. Commonly known as the “normal Zeeman effect”, the simplest form of this is the splitting up of one spectral line into three components. This normal Zeeman Effect is studied using a cadmium spectral lamp as a specimen. The cadmium lamp is submitted to different magnetic flux densities and the splitting up of the red cadmium line (643.8 nm) is investigated using a Fabry-Perot interferometer. Evaluation of the results leads to a fairly precise value for Bohr’s magnetron.
An electromagnet is put on the rotating table for heavy loads and mounted with the two pole-shoes with holes in such a way that a gap large enough for the Cd-lamp (9-11 mm) remains for the Cd-lamp. The pole-shoes have to be well tightened in such a way that they cannot move later on when the magnetic flux is established. The Cd-lamp is inserted into the gap without touching the pole-shoes and connected to the power supply for spectral lamps. Coils of the electromagnet are connected in parallel and via an ammeter connected to the variable power supply of up to 20 VDC, 12 A. A capacitor of 22000 mF is in parallel to the power output to smoothen the DC-voltage.
The iris diaphragm is eliminated for initial adjustment and for the observation of the longitudinal Zeeman Effect. During observation of the transverse Zeeman Effect the iris diaphragm is illuminated by the Cd-lamp and such it acts as the light source. A pair of lenses create a nearly parallel light beam, which the Fabry-Perot etalon needs for a proper interference pattern. The etalon contains a removable color filter that lets the red cadmium line at 643.8 nm pass. The lens produces an interference pattern of rings which can be observed. Ring diameters can be measured using the CCD-camera and the software supplied with it. In the classical version, the interference pattern is produced within the plane of the screen with a scale mounted on a slide mount which can laterally be displaced with a precision of 1/100th of a millimeter.
Includes Fabry-Perot interferometer; Cadmium lamp for Zeeman effect; electromagnet without pole shoe; pole pieces, drilled, conical; rotating table for heavy loads; power supply for spectral lamps; variable transformer, 25 V AC/20 VDC, 12 A; capacitor, electrolytic, 22000 µF 06211.00 1; digital multimeter; optical profile-bench; base for optical profile-bench; slide mount for optical profile-bench; lens holder; mounted lens, f = +50 mm; mounted lens, f = +300 mm; iris diaphragm; polarizing filter, on stem; polarization specimen, mica; connecting cords; CDC-Camera for PC including measurement software.
System requirements:
PC with USB interface: Windows 98SE/Windows Me/ Windows 2000/Windows XP
For your convenience this experiment is available to you as a complete set.
Everything you require to perform the activities are included in the total price.
For assistance in using your new equipment we also offer professional development (WLS1808-24) on all PHYWE line products.
For customization options and pricing please contact your local Cenco representative.
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