Unpolarized light is incident on two ideal polarizers in series. The polarizers are oriented so that no light emerges through the second polarizer. A third polarizer is now inserted between the first two and its orientation direction is continuously rotated through 180o. The maximum fraction of the incident power transmitted through all three polarizers is
A. Zero
B. 1/8
C. 1/2
D. 1/√2
E. 1
(GR8677 #74)
Solution:
Power ~ Intensity
The maximum fraction of intensity is: I = I0/8 (see GR0177 #51)
→ P = P0/8
Answer: B
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