Physics - Wave Optics Question with Solution | TestHub

Unpolarized light of intensity$I$is incident on a system of two polarizers,$\mathrm{A}$followed by$\mathrm{B}$. The intensity of emergent light is$\frac{I}{2}$. If a third polarizer$\mathrm{C}$is placed between$\mathrm{A}$and$\mathrm{B}$the intensity of emergent light is reduced to$\frac{I}{3}$. The angle between the polarizers$\mathrm{A}$and$\mathrm{C}$is$\theta$, then