KCET 2014 Physics Solved Paper

According to Malus Law, we have
I=I0cos2θ
where, I is intensity of emergent polarised light; I0 is intensity of incident polarised light; θ is angle between pass axis of both polarisers
Here θ=60°
Therefore I=I0(cos‌60)2=I0(‌

1

2

)2=‌

I0

4

Thus, intensity of emergent polarised light from second polarizer =

I0

4