Faraday Effect with Diode Laser

Item Code: SK194

Working and Principle :

If a transparent isotropic material is placed in a strong magnetic field and linearly polarized light is transmitted in the direction of the magnetic field, the plane of polarization of linearly polarized light rotates by an angle.
... In the present setup the optical activity of flint glass is investigated in a magnetic field. The angle of rotation of plane polarized light is proportional to the length (L) and magnetic field (B).
Ø=V.L.B
Where
Ø = Angle of rotation
V = Verdet’s constant
L = Length of flint glass
B = Magnetic field strength
The magnetic field is measured using Gauss meter with axial probe.




  • All electrical connections are made using 4mm safety plugs & sockets.
  • Compact & portable electromagnet.
  • High current DC power supply with safety features like short circuit protection, over heat protection etc.
  • Saddle can hold rod from 8 to 15mm.
  • Heavy, rigid and stable Triangular Optical bench (made of Al extrusion).
  • Height and level adjustment screws (made of SS)
  • Analyser/Polarizer with 0 ± 90° graduation.
  • He-Ne laser with built-in power supply.
  • Green diode laser with less power consumption.

  • Observing the rotation of the polarization plane when polarized monochromatic light passes through flint glass under influence of a magnetic field.
  • Determining Verdet’s constant from the relation between rotation angle and magnetic flux.
  • Flint Glass : DEDF glass, size 15x15x15mm
  • DC Power supply : 0-30V DC, 10A, 3½ Display LED
  • Digital Gauss meter : Range 2KG & 20 KG, Resolution 1G & 10G, Sensor In As
  • Electromagnet coil : 500 Turn coil, 7Amp (Max.)
  • Electromagnet Core : Ferromagnetic, 40x40mm cross section,
  • Optical bench : Al exclusion, L=1 mtr., Triangular shape with end stop, 4 SS levelling screw
  • Transversal slider : Al, 25 – 0 – 25mm, LC 0.01mm
  • Fixed slider : Al, Base width 50mm, Height 115mm
  • Diode laser : Wavelength 532nm, 5mW, Class II
  • 1 Flint glass with Holder
  • 1 Electromagnet unit with slider
  • 1 Pair of Polarizer / Analyzer
  • 1 Object screen
  • 1 Optical bench, 1 m
  • 4 Fixed slider
  • 1 Power supply (0-30V DC,10A)
  • 1 Digital gauss meter with probe
  • 1 Hall probe holder
  • 1 Convex lens (F=10cm)
  • 2 Plug lead 100 cm, Black
  • 1 Plug lead 100 cm, Red
  • 1 Plug lead 50 cm, Yellow
  • 1 Cylindrical base
  • 1 Green Diode laser
  • 1 Power Adapter
  • Opto-Magneto effect
  • Birefringent
  • Flint Glass
  • Polarization of light
  • Verdet’s constant
  • Electromagnetism.
  • Plane of polarization