The revised and updated Fifth Edition of the most popular paperback dictionary of physics available. Containing 32 pages of new entries, and now with biographies of key scientists, A Dictionary of Physics covers all of the most commonly encountered terms and concepts of physics. There are over 3,500 clear and concise entries, including topics such as group theory, particle-beam experiments, radioisotope imaging, and spherical harmonics. Longer feature articles on important topics, such as crystal defects, magnetic resonance imaging, and the solar system are also provided. Chronologies chart discoveries in the main fields of physics, including atomic theory, cosmology, and microscopy. Comprehensive and up-to-date, this is the ideal reference tool for students of physics.