Physics Dept. Demonstration Manual

DOP 08.2 - Polarization


To show the action of polarizer and analyzer.

  • Wrinkled Mylar sheet
  • Motor driven polarized disc
  • Clamp, stand
  • Stationary disc
  • Wood spacers (heat reduction)


For demonstrating polarized light, the motor-driven disc is inserted in the beam of an overhead projector. Wood spacers and a polarizing disc are laid on the overhead projector. Samples can be continuously analyzed at all polarization angles.


Wiping or scratching the polarized discs leaves very fine scratches, resulting in random polarization. Also, handle and rotate the discs by the metal edge only.