"This book is designed as per the recommended syllabus of AICTE for the Physics courses: Oscillation, Waves and Optics and Quantum Mechanics. The book explains the simple harmonic motion with a number of examples of mechanical and electrical oscillators, non-dispersiv transverse and longitudinal waves followed by an introduction to dispersion. As the book advances, it describes the propagation of light, geometrical optics, the phenomena of interference and diffraction, followed by lasers and their latest applications. Coverage also includes an introduction to quantum mechanics, solution of wave equation and introduction to solids and semiconductors."