In the first figure below, unpolarized light is sent into a systemof three polarizing sheets. The angles θ1,θ2, andθ3 of thepolarizing axes of the sheets are measured counterclockwise fromthe positive direction of the y axis (they are not drawnto scale). Angles θ1 andθ3 arefixed but angle θ2 can bevaried. The second figure below gives the intensity of the lightemerging from sheet 3 as a function of θ2. (Thescale of the intensity axis is not indicated.) What percentage ofthe light's initial intensity is transmitted by the three-sheetsystem when θ2 =30°?
