(i) Unpolarised light of intensity I0 passes through two polaroids P1 and P2 such that pass-axis of P2 makes an angle θ with the pass-axis of P1. plot a graph showing the variation of intensity of light transmitted through P2 as the angle θ varies from zero to 180°.
(ii) A third polaroid P3 is placed between P1 and P2 with pass-axis of P3 making an angle β with that of P1. If I1, I2 and I3 represent the intensities of light transmitted by P1,P2 and P3, determine the values of angle θ and β for which I1 = I2 = I3.
