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A beam of unpolarised light of intensity is passed through a polaroid A and then through another polaroid B which is oriented so that its principal plane makes an angle of 45^(@) relative to that of A. The intensity of the emergent light |
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Answer» `(I_(0))/(8)` `I_(1)=I_(0) cos^(2) theta` `I_(1)=(I_(0))/(2)` The intensity of emergent light from polaroid `I_(2)=I_(1) cos^(2) theta` `=(I_(0))/(2)cos^(2)45^(@)` `=(I_(0))/(2)xx(1)/(2)=(I_(0))/(4)` |
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