A beam of linearly polarised is change into circularly palarised light by passing it through a slice of cryslal 0.003 cm thick. Calculate the difference n the refractive index of the two rays in the crystal assuming this to be minimum thickness that wil produce the effect and that the wavelength is 6xx10^(-5) cm.
Which of the following diagrams represent the veriation of electric field vector with time for a circularly polarised light
