Applied Physics is designed to cater to the needs of first year undergraduate engineering students of Jawaharlal Nehru Technical University (J.N.T.U). Written in a lucid style, this book assimilates the best practices of conceptual pedagogy, dealing at length with various topics such as crystallography, principles of quantum mechanics, free electron theory of metals, dielectric and magnetic properties, semi conductors, superconductivity, lasers, holography, and nanotechnology.