Question

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

• A. $ \frac{1}{2}\,I_{0} $
• B. $ \frac{1}{4}\,I_{0} $
• C. zero
• D. $ I_0 $

Answer 1

Answer: (A)

According to Malus law $ I = I_0 cos^2 \, \theta $
Intensity of polarized light = $ \frac{I_0}{2} $
$ \therefore $ Intensity o untransmitted ight = $ I_0 - \frac{I_0}{2} = \frac{I_0}{2} $