A beam of unpolarised light of intensity I_(0) 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 is :

A beam of unpolarised light of intensity I_(0) is passed through a pol

1.	A beam of unpolarised light of intensity I_(0) 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 is :
Answer» `(I_(0))/(2)` `(I_(0))/(4)` `(I_(0))/(8)` `I_(0)` Solution :`I_(R) = ((I_(0))/(2)) COS ^(2)(45^(@) = (I_(0)/(2)) xx (1)/(2) = (I_(0))/(4))`

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A beam of unpolarised light of intensity I_(0) 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 is :

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