Two Polaroids P1 and P2 are placed with their axis perpendicular to each other. Unpolarised light I0 is incident on P1. A third polaroid P3 is kept in between P1 and P2 such that its axis makes an angle 45º with that of P1. The intensity of transmitted light through P2 is
1
\(\frac{I_{0}}{16}\)
2
\(\frac{I_{0}}{2}\)
3
\(\frac{l_{0}}{4}\)
4
\(\frac{I_{0}}{8}\)