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A polariser and an analyser are oriented...

A polariser and an analyser are oriented so that maximum light is transmitted what will be the intensity of outcoming light when analyer is rotated through `60^(@)`.

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According to malus law `I=I_(0)cos^(2)theta=I_(0)cos^(2)60^(2)60^(@)=I_(0)[(1)/(2)]^(2)=(I_(0))/(4)`
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