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Synopsis The electromagnetic theory of light determines with the aid of constitutive relations and equations the electronic and magnetic fields produced by any assigned distribution of charge density and current density.  The electrons in the atom move in orbits around the nucleus without radiating any energy and only when a transition takes place from one orbit to another, then does emission or absorption of radiation takes place.  "Electromagnetic Theory and Optics" is a sincere attempt to bring before readers fundamental concepts concerning electromagnetism and spectra.  In this analysis, the book makes picturesque presentation of various concepts, laws, principles and theorems concerning electromagnetism - equations, waves, radiation, momentum, relativity, acceleration, dispersion, emission and absorption, energy distribution, etc.; refraction, lenses, chromatic aberration, telescope, microscope and prism; aberration, spectra, velocity of light, electronic bonds and wave mechanics; and diffraction, various slits, aperture, spectrometer, interference and interferometers, inter alia, numerous other phenomena.  This book is of immense utility to students, teachers, and general readers.