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A system of three polarizers P 1 , P 2 , P 3 is set up such that the pass axis of P 3 is crossed with respect to that of P 1 . The pass axis of P 2 is inclined at 60º to the pass axis of P 3 . When a beam of unpolarized light of intensity I 0 is incident on P 1 , the intensity of light transmitted by the three polarizers is I. The ratio (I 0 /I) equals (nearly):

1. 10.67
2. 5.33
3. 16.00
4. 1.80

Correct answer: 10.67

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