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If the angle between the polarizer and the analyser is increased from 30 degrees to 60 degrees, how will the intensity vary ? |
It will increase exactly by a factor of 3 It will remain constant It will decrease exactly by a factor of 3 It may increase or decrease depending upon the nature of the analyser. |
It will decrease exactly by a factor of 3 |
By I = Io Cos2\(\theta \) , $I_1 = I_0 \frac{3}{4}$ $I_2 = I_0 \frac{1}{4} = \frac{I_1}{3}$ |
