Two polarizers, P1 and P2, are oriented perpen- +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 Io is incident on P1. What is the intensity of light after it passes through the three polarizers? 00 +x А. 0 C. D. lo B. I.
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