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Two polaroids are kept with theirtransmission axes inclined at30^(@). Unpolarised light of intensity I falls on the first polaroid. Find out the intensity of light emerging from the second polaroid. |
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Answer» Solution :As the intensity of the unpolarised light falling on the first polaroid is I, the intensity of POLARIZED light EMERGING will be, `I_(0) = ((1)/(2))`. Let I. be the intensity of light emerging from the SECOND polaroid. Malus. law, `I. = I_(0) cos^(2) theta` Substituting, `I.=((1)/(2))cos^(2)(30^(@))=((1)/(2))((sqrt(3))/(2))^(2)=1(3)/(8)` `1.=((3)/(8))I` 
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