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

According to By Malus law, `l-l_(0)cos^(2)theta`
(l = Intensity of emergent polarised light)
where, `theta=60^(@),l=?=l_(0)xxcos^(2)60^(@)`
(`l_(0)` = intensity passed through polariser)
`=l_(0)xx(1/2)^(2)=l_(0)/4`