Book «School Olympiads of SPbU 2021 . Physics, created by a team of authors, is a unique and rich resource for those who seek not only to prepare for the school competitions in physics, but also to better understand the amazing world of nature and the laws that govern our world. This book is not just a collection of problems and solutions, but a real guide to the complex but exciting aspects of physics, which is able to inspire and expand the horizons of knowledge for both schoolchildren and their mentors. What does "School Olympiads SPbSU 2021 . Physics is especially attractive for readers? First of all, it is its relevance and practical focus . The authors, united by the rich experience of teachers and participants of the Olympiad, carefully selected tasks that reflect the level and format of the Olympic tests held in 2021 at St. Petersburg State University .. Each task is not just an exercise, but a challenge for the mind, requiring logical thinking, creativity and a deep understanding of physical principles. The book presents both typical tasks and more complex ones that require non-standard approaches, which makes it an indispensable assistant for those who want not only to prepare for the Olympics, but also to develop analytical skills. The book is intended for high school students, their teachers and anyone interested in physics at a level beyond the school curriculum. It will be useful for young physicists who dream of entering leading technical universities, as well as for those who just like to solve the riddles of nature and are looking for new intellectual challenges. The age range of readers is from 14 to 18 years, but the book may be of interest to older students who want to refresh their knowledge or prepare for serious competitions. The topics raised in this book cover a wide range of physical phenomena and concepts, from mechanics and thermodynamics to electromagnetism and optics. Each topic is revealed through the prism of the Olympic tasks, which allows the reader not only to get acquainted with the theoretical aspects, but also to learn how to apply them in practice. As a result, the book contributes to the development of critical thinking, the ability to simulate situations and find non-standard solutions. Particular attention is paid to the preparation for the Olympics, so the material is presented in such a format to prepare the reader as much as possible for the real tasks that he will face at the competitions. The style of the authors is distinguished by clarity, logic and vivid presentation. They are able to interest and retain attention, turning even complex topics into an exciting journey through the world of physics. The book contains vivid explanations, illustrations and clues that make learning not only effective, but also enjoyable. The authors, known for their publications and lectures, use an approach close to their other popular works - they make physics accessible and interesting to a wide range of readers. If you are looking for a book that will help not only to prepare for the Olympics, but also to discover the beauty and harmony of physical laws, "School Olympics SPbU 2021. Physics" is exactly what you need. This is a real storehouse of knowledge for those who want to become the best, who likes to solve complex problems and strives for new heights in the study of physics. It does not matter whether you start your journey in the world of science or are already an experienced participant of the Olympics, this book will become your reliable companion and source of inspiration.