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A narrow beam of unpolarised light of intensity I_(0) is incident on a polaroid P_(1). The light transmitted by it is then incident on a second polaroid P_(2) with its pass axis making an angle of 60^(@) to the pass axis of P_(1). Find intensity of light transmitted by P_(2). |
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Answer» Solution :According to Malus' Law `I=I_(0)cos^(2) theta` `I=((I_(0))/2)cos^(2) theta` where `I_(0)` is the INTENSITY of UNPOLARIZED light. `theta=60^(@)C` (given) `I=(I_(0))/2cos^(2) 60^(@)=1/2=(I_(0))/2xx(1/2)^(2)=(I_(0))/8` |
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