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A system of three polarizing sheets (Figure 4) is placed in the path of initially unpolarized light The polarizing direction of the first sheet, P1. is parallel to the y-axis, that of the second sheet, P2, is 600 counterclockwise from the y-axis, and that of the third sheet, P3, is parallel to the x-axis. 61 XFigure 4 Determine the fraction of the initial intensity lo of the light emerges from the system, Le ratio lo/13 O.A. 6.66 OC 109 O D. Q 092