p34_034 - 34. After passing through the first polarizer...

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Unformatted text preview: 34. After passing through the first polarizer the initial intensity I0 reduces by a factor of 1/2. After passing through the second one it is further reduced by a factor of cos2 (π − θ1 − θ2 ) = cos2 (θ1 + θ2 ). Finally, after passing through the third one it is again reduced by a factor of cos2 (π − θ2 − θ3 ) = cos2 (θ2 + θ3 ). Therefore, If I0 = = 1 cos2 (θ1 + θ2 ) cos2 (θ2 + θ3 ) 2 1 cos2 (50◦ + 50◦ ) cos2 (50◦ + 50◦ ) = 4.5 × 10−4 . 2 ...
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