The course PHY307 gives a deep understanding of the underlying physics governing the types of waves and their interaction. A general solution of the one-dimensional wave equation will be treated by using calculus methods. Other topics covered include: Fourier series, Acoustic waves in Fluids: Waves on the liquid surface, basic hydrodynamics; Wave Propagation in inhomogeneous and Obstructed Media; The WKB approximation; an expose on Geometrical optics; and Spectrum Analysis of wave forms.