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17. Unpolarized light with intensity I is incident on two polaroids. The axis of the first polaroid makes an angle of 50 with the vertical,

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17. Unpolarized light with intensity I is incident on two polaroids. The axis of the first polaroid makes an angle of 50 with the vertical, and the axis of the second polaroid is horizontal. What is the intensity of the light after it has passed through the second polaroid? [Ans: 1 /2 x (cos 409)=]

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