Physics: 1963-1970 focuses on the history, developments, and trends in physics, including the applications of lasers, semiconductors, and electrodynamics. The book first offers information on events, laws of nature, and invariance principles and the shell model. Topics include magic numbers, atomic analogue, individual orbits in the nucleus, and the use of invariance principles and approximate invariances. The text also ponders on the production of coherent radiation by atoms and molecules, including basic maser principles, maser clocks and amplifiers, and application of lasers. The publication takes a look at semiconductor lasers and development of quantum electrodynamics. Discussions focus on methods of obtaining states with negative temperature in semiconductors; conditions for the production of negative temperature in semiconductors; and semiconductor lasers. The text also examines the optical methods for studying Hertzian resonances, energy production in stars, and developments in particle physics. The manuscript is a dependable reference for readers interested in the history, developments, and trends in physics.