Polarization Of Light-Malu's Law

Description:

Malu’s law states that, when a completely polarized light emitted from a polariser falls over a polaroid which is used as an analyser, the intensity of the light transmitted by the analyser is directly proportional to the cosine of angle between the polariser and the analyser.

I ∝ Cos²θ

I = I₀ Cos²θ

Where,

• I = Intensity of light transmitted by analyser,

• I₀ = Maximum intensity of polarized light (Constant),

• θ = Angle between polarizer and analyzer.

When θ = 45⁰, then the intensity is reduced to half of the actual intensity of polarized light.