1) An unpolarized beam of intensity I0 is incident on a pair of nicols making an angle of 60° with each other. The intensity of light emerging from the pair is A) $I_{0}$ B) $I_{0}$/2 C) $I_{0}$/4 D) $I_{0}$/8 Answer: Option CExplanation:According to Malu's law $I= I_{0}\cos^{2}\theta=I_{0}(\cos^{2}60^{0})$ = $ I_{0}\times(\frac{1}{2})^{2}= \frac{I_{0}}{4}$
