'Ideal vertical polarizer giving' presentation slideshows

a) I 2 = 0 b) I 2 = 0.25 I 0 c) I 2 = 0.5 I 0 d) I 2 = I 0 e) None of the above.

Completely unpolarized horizontally traveling light of intensity I 0 is normally incident on a vertical polarizer. The light that gets through is then normally incident on a horizontal polarizer. How does the intensity I 2 of the light that gets through both polarizers compare with I 0 ?.

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