Polarisation - Malus' law

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1. 1 2022 Phase 2 Wave Optics #
   After passing through a polariser a linearly polarised light of intensity I is incident on an analyser making an angle of $30^\circ$ with that of the polariser. The intensity of light emitted from the analyser will be:
   A $\frac{2I}{3}$ B $\frac{I}{2}$ C $\frac{I}{3}$ D $\frac{3I}{4}$
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