This new edition has been thoroughly revised and has been redesigned to meet the best contemporary standards. It includes new material on electron waves in solids using the kronig-penney model to show how their allowed energies are limited to brillouin zones, the role of phonons is also discussed. An optical transform is used to demonstrate the modern method of lens testing. In the last two chapters the sections on chaos and solutions have been reduced but their essential contents remain. As with earlier editions, the book has a large number of problems together with hints on how to solve them. The physics of vibrations and waves, 6th edition will prove invaluable for students taking a first full course in the subject across a variety of disciplines particularly physics, engineering and mathematics. � simple harmonic motion � damped simple harmonic motion � the forced oscillator � coupled oscillations � transverse wave motion � longitudinal waves � waves on transmission lines � electromagnetic waves � waves in more than one dimension � fourier methods � waves in optical systems � interference and diffraction � wave mechanics � non-linear oscillations and chaos � non-linear waves, shocks and solutions.