A polarised light intensity `I_(0)` is passed through another polariser whose pass axis makes an angle of `60^(@)` with the pass axis of the former, What is the intensity of emergent polarised light from second polarised?

Options

A. `I=I_(0)`
B. `I=I_(0)//6`
C. `I=I_(0)//5`
D. `I_(0)//4`

Answer

D

Explanation

By Malus's law `I=I_(0)cos^(2) theta` (I=intensity of imergent polarised light `I_(0)` = intensity passed through polariser)
where `theta=60^(@)=I`=?
`rArr I=I_(0)xxcos^(2)60^(@)=I_(0)xx(1/2)^(2)=I_(0)/4`