JEE Main 201816 Apr, Morning shiftPhysicsHardOptics190× since 2002
Unpolarized light of intensity I is incident on a system of two polarizers, A followed by B. The intensity of emergent light is I/2. If a third polarizer C is placed between A and B, the intensity of emergent light is reduced to I/3. The angle between the polarizers A and C is . Then :