(i) State law of Malus.
(ii) Draw a graph showing the variation of intensity (I) of polarised light transmitted by an analyser with angle ($\theta $) between polariser and analyser.
(iii) What is the value of refractive index of a medium : of polarising angle 60° ?
i) Law of Malus : According to Malus, when completely plane polarised light is incident on the analyser, the intensity I of the light transmitted by the analyser is directly proportional to the square of the cosine of angle between the transmission axes of the analyser and polarizer i.e I \alpha co${{s}^{2}}$$\theta $.
(ii) Variation of Intensity (I) of polarised light with angle between polariser and analyser.
