Faraday Effect Experiment

Topics covered:
- Electromagnetic interactions
- Electron oscillation
- Electromagnetism
- Polarization
- Verdet constant
- Hall effect

Principles and objectives:
Faraday effect is a magneto-optical phenomenon. It involves an interaction between linearly polarized light and a material medium (here a Flint glass rod) subjected to a magnetic field. The proportionality factor, called Verdet constant, is studied as a function of the wavelength and the optical medium. The different steps of the study are:

1. Determining the magnetic flux density between the pole pieces using the axial Hall probe of the teslameter for different coil currents.
2. Measuring the maximum flux density as a function of the coil current and establishing the relationship between the average flux density and the coil current.
3. Evaluating the rotation angle based on the average flux density using different color filters. Calculating the corresponding Verdet constant in each case.
   

Composition:
- Glass rod for Faraday effect
- Coil, 600 turns / Polar pieces, pierced / U-shaped core, laminated magnetic sheet
- Experimental LED HEX 2 lamp
- Digital multimeter with thermocouple
- Cross switch
- Digital teslameter / Axial Hall probe
- Biconvex glass lens, f = +150 mm / Component holder / Universal rotary support
- Sliding plate support for optical bench
- Colored filters: violet, blue-green, green, and yellow
- Polarizer on rod
- Translucent screen, 250 x 250 mm
- Optical bench, L = 1000 mm / Adjustable foot for optical bench
- Optical bench riders: h = 30 mm / h = 80 mm
- Stainless steel support rod, 100mm / Double nut
- Universal power supply, analog display, DC: 18 V, 5 A / AC: 15 V, 5 A