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what intensity of light emerges from the third polarizer?

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Answer #2

After 1st polarizer: (10)/2 = 5 W/m2

After 2nd polarizer: 5*cos2(30) = 3.75 W/m2

After 3rd polarizer: 3.75*cos2(60) = 1.875 W/m2

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Answer #3

After 1st polarizer: (10)/2 = 5 W/m2

After 2nd polarizer: 5*cos2(30) = 3.75 W/m2

After 3rd polarizer: 3.75*cos2(60) = 0.9375 W/m2

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