Higher Physics Lab Light & Optics



Exp-1 To measure the light intensity of plane polarised light as a function of the analyzer position.
Exp-2 To study the polarization of light by half wave plate.
Exp-3 To verify the inverse square law.
Exp-4 To verify Malus-law.

  • Monochromatic light.
  • Computer connectivity.
  • Precise measurement using vernier light sensor.
  • Polarization
  • Malus law
  • Polarizer, Analyser
  • Half-wave plate
  • Plane of polarization

Principle and Working :
A wave plate or retarder is an optical device that alters the polarization state of a light beam traveling through it. In the present setup, the diode laser light passes through polarizer to produce linearly polarized light. It then passes through the half wave plate L/2. The L/2 plate produces linear polarised light. For different angles of the L/2 plate with respect to optic axis only the polarisation plane changes. The maximum and minimum are not changed which can be investigated with the analyser over the range -90 to +90 degrees.


Cat No. Item Name Qty.
CH829 Diode laser 1
SL214 Optical bench 1
SL801 Polarizer / Analyzer 1
SL436 Transverse saddle 2
CD495 Half wave plate 1
  Light sensor 1
  Data logger 1
CD542 Light sensor holder 1

* Additionally Required
Computer is not supplied with this setup.

Light & Optics Experiments