As shown in Fig. \( a \), unpolarized light is sent into a system of three polarizing sheets. Th...
0As shown in Fig. \( a \), unpolarized light is sent into a system of three polarizing sheets. The angles \( \theta_{1}, \theta_{2} \) and \( \theta_{3} \) of the polarizing directions are measured counterclockwise from the positive direction of the \( y \)-axis (they are not drawn to scale). Angles \( \theta_{1} \) and \( \theta_{3} \) are fixed, but angle \( \theta_{2} \) can be varied. Figure \( b \) gives the plot between of the intensity of the light emerging from sheet 3 as a function of \( \theta_{2} \). The scale of the intensity axis is not indicated.) What percentage of the light's initial intensity is transmitted by the three-sheet system when \( \theta_{2}=90^{\circ} \) ?
(a)
(b)
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