Malus law Setup NV6023 is a useful optics setup for students. It establishes the transverse nature of light and based on the polarization of light. Incandescent lamp is used as light source to study the phenomenon by direct vision as well as for intensity measurement. With the help of this setup, both the basic laws of polarization - Brewster’s law and Malus law can be understood easily. The polarization can be studied by direct vision as well as by reading the variation of intensity through a digital ammeter connected across a photodiode. The verification of Malus law particularly, can be done in three different ways using: two coaxial polaroids, two parallel plain glass plates and a combination of glass plate and polaroid.