Faraday Effect Apparatus - Multi wavelength

Faraday Effect Apparatus

Multi wavelength

Model: HO-ED-P-04B

The apparatus consist of a halogen lamp as the polychromatic light source, fitted with a condenser lens system, and a filter wheel which comes with five narrow band interference filters to get the precise wavelength. This is followed by a polarizer, an electromagnet with power supply, an analyzer with a mechanical rotator adjustment and a detector. A highly sensitive photo detector is used to measure the light intensity as a function of the analyzer angle for a full rotation.

When light passing through certain materials is exposed to a parallel magnetic field, a Faraday rotation occurs. Faraday rotation is a magnetooptical phenomenon that rotates the plane of polarization of light. This experiment is appropriate for sophomore, junior, or senior students in physics. Faraday Effect Multi wavelength Apparatus can be used to measure Verdet constants in solid samples at different wavelengths.

Experiment Examples

To observe Faraday Effect

Faraday Effect is a magneto optical effect in which the plane of polarized light is rotated as it passes through a medium that is placed in a magnetic field.

To determine the angle of rotation as a function of the mean flux density at different wavelengths

Fig. Verdet’s Constant as a function of wavelength.
The ‘+’ points represent the measured values of Verdet’s Constant at different wavelengths

To calculate the corresponding Verdet constant of the given sample at different wavelengths

Using different color filters, the angle of rotation as a function of the mean flux density is determined.

The corresponding Verdet constant is calculated in each case using the relation,

V = θ / ( B.L )

from the slope of the graphs.

Verdet constant is evaluated as a function of the wavelength.

Faraday Effect is a magneto optical effect in which the plane of polarized light is rotated as it passes through a medium that is placed in a magnetic field. The amount of rotation is dependent on the amount of sample through which the light passes, strength of the magnetic field and proportionality constant called the Verdet's Constant.

i.e θ = V l B

Strength of the magnetic field, B = πN I, where N - Number of turns per unit length of the coil, and I - current through the coil

Features

Modern and user friendly design

The optical filters are of high quality, in order to reduce the error while selecting the wavelength.

Laboratory grade corrosion free components

Scope of Supply

Optical Rail

Model No: ED-P-04B-OR

Length

1000 mm

Material

Black anodized Aluminum alloy

Quantity

1 no.