82 - The Law of Malus

In this lab assignment, you will investigate the law of Malus which states the following: For a polarized light beam, which passes through a polarizer, the intensity after the polarizer depends quadratically on the cosine of the angle between the light's initial polarization direction and the axis of the polarizer.


  • Smartphone with the Physics Toolbox Sensor Suite (see manual for more information)
  • Source of Polarized Light (eg flat-screen monitor)
  • Polarizing lens (eg 3D cinema goggles, sunglasses)
English Manual

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