A fundamentally new type of textbook. The sequence of presentation corresponds to the logical structure of physics as a science and reflects modern trends in its teaching. The material is divided into mandatory and additional, which allows you to build the learning process taking into account the individual abilities of students, including the organization of their independent work. Tasks serve both to gain new knowledge and to develop research skills. For students of schools, gymnasiums, lyceums with in-depth study of physical and mathematical disciplines, as well as to prepare for competitive exams in universities.