Q.

When the polarizer and the analyzer are arranged such that the angle between their optical axes is 30o , the intensity of the light emerging from the analyzer is I1 and when the angle is increased to 60o , the intensity of the light emerging from the analyzer is I2 . The ratio I1 : I2 is

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a

1 : 1

b

1 : 3

c

3 : 1

d

3 : 1

answer is C.

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Detailed Solution

I1=Io2Cos2⁡30∘&I2=Io2Cos2⁡60∘⇒I1I2=3/41/4=31
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When the polarizer and the analyzer are arranged such that the angle between their optical axes is 30o , the intensity of the light emerging from the analyzer is I1 and when the angle is increased to 60o , the intensity of the light emerging from the analyzer is I2 . The ratio I1 : I2 is