Mathematics of wave motion. Electromagnetic theory of light, Fresnel Coefficients, optics of thin films. Polarization. Nature of polarized light, polarizers, Dichroism, Birefringence, retarders, Faraday rotation, Kerr effect, Optical activity, John metrics. Interference of two beams, interference of more than two beams, Mich. Interferometer, Fabry-Perot interferometer, diffraction. Theory of diffraction. Diffraction from slits and apertures. Diffraction Gratings