A-Level CAIE Physics AS 7.5.2—Malus’s law (I = I0 cos2θ ) to calculate the intensity of a plane-polarised Question Bank

• recall and use Malus’s law (I = I0 cos2θ ) to calculate the intensity of a plane-polarised electromagnetic wave after transmission through a polarising filter or a series of polarising filters (calculation of the effect of a polarising filter on the intensity of an unpolarised wave is not required)