The textbook deals with the wave and quantum properties of light, elements of quantum mechanics, physics of the atomic nucleus and elementary particles. The main attention is paid to the interpretation of the fundamental laws of nature, as well as the study of various physical phenomena and facts. In addition, examples of problem solving are considered, questions for self-testing are given. The presented material is intended for successful mastering of general, its course of physics and other physical disciplines .. The manual corresponds to the program of the physics course of the directions of training 35. 03. 06 - Agroengineering, 13. 03. 01 - Thermal power engineering and heat engineering, 13. 03. 02 - Electricity and electrical engineering of higher educational institutions and is focused on the development of professional competencies . It is intended for interuniversity use by students of full-time, correspondence and distance forms of education .