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Two polaroids are kept with their trans...

Two polaroids are kept with their transmission axes inclined at `30^(@)`. Unpolarised light of intensity I falls on the first polaroid. Find out the intensity of light emerging from the second polaroid.

Text Solution

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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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