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When an unpolarized light of intensity I_{0} is incident on a polarizing sheet, the intensity of the light which does not get transmitted is

  • Option 1)


  • Option 2)


  • Option 3)


  • Option 4)



Answers (1)


As we learnt in

Malus Law -

I= I_{0}\cdot \cos ^{2}\theta

\theta = angle made by E vector with transmission axis.

- wherein

I= Intensity of transmitted light after polarisation .

I_{0}= Intensity of  incident light.




Intensity\; of \; polarized \; light\: \; = I_{0}/2

intensity \; of\; light\; not\; transmitted \; = I_{0}-\frac{I_{0}}{2}= \frac{I_{0}}{2}

Correct option is 3.


Option 1)


This is an incorrect option.

Option 2)


This is an incorrect option.

Option 3)


This is the correct option.

Option 4)


This is an incorrect option.

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