Two polarizers, P1 and P2, are oriented perpen- 00 +z dicular with each other as shown in the figure. A third polarizer P3 oriented 45°relative to the +z-axis, is inserted between P1 and P2. If an unpolarized light beam of intensity I, is incident on P1. What is the intensity of light after it passes through the three polarizers? +x A. 0 c. -lo В. D.

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