Question

A partially plane polarised beam of light is passed through a polaroid. Show graphically the variation of the transmitted light intensity with angle of rotation of the polaroid ?

Answer 1

Here is the graph of variation of the transmitted light intensity and angle of rotation of the polaroid .
\[I_P = I_0 \cos^2 \theta\] 

Here, I₀ = original intensity of light
           θ = angle of rotation
It is shown graphically as below: