The book is divided into 9 chapters, six chapters are related to electrodynamics and electromagnetic waves and three are related to relativity. First chapter is relates to motion of charged particle in different fields like electric field, magnetic field and electromagnetic field. Baunbridge's mass spectrographs, Thomson's method and working of C.R.O. is also explained in this chapter. Chapter two is related to Faraday's law of electromagnetic induction giving an idea about Maxwell's equations and boundary conditions related to electric and magnetic fields. Chapter three is related to electromagnetic potentials. Chapter four is devoted to electromagnetic waves, covering Poynting vector, energy and momentum propagation of electromagnetic waves, Chapter five shows the reflection and transmission of electromagnetic waves in media covering the Fresnel's relations, Brewster's angle, modified equation and total internal reflection. Chapter sis is for radiation from an accelerated charge. Chapter seven give Einstein postulates of special theory of relativity, Michelson-Morley experiment, relativity of time, relativity of length, relativity of velocity, stellar aberration of light, and Doppler effect in light. Chapter eight described the relativistic dynamics, four vector, relativity of mass and chapter nine is related to relativistic electrodynamics.