Unpolarised light is passed through a polaroid  `P_(1)`.  When this poalrised
Channel: Doubtnut
Date: 2020-08-02

Unpolarised light is passed through a polaroid  `P_(1)`.  When this poalrised beam passes through another polaroid `P_(2)`, and if the pass axis of `P_(2)` makes an angle `theta` with pass axis of `P_(1)`, then write the expression for the polarised beam passing through `P_(2)`. Draw a plot showing the variation of intensity when `theta` varies from 0 to 2 `pi`.