Dear reader,
The book you are holding in your hands completes, with its comprehensive presentation of the theory, with the documented answers to the questions and exercises of the school Book, as well as the questions and exercises for additional practice, and with the revision tests, the new school book for Physics of the 3rd Gymnasium.

Throughout its writing, we had in mind that it is addressed to female students and male students who are just beginning to study Physics within the framework of their secondary compulsory education.

We are among the many who dream of female students and male students of the Gymnasium who:
- will get to know and understand the scientific concepts and processes that are necessary for their participation in society, in the present and in the future
- will be able to ask questions and find answers to issues that arise from their everyday experiences and arouse their interest
- will be able to describe, explain and predict natural phenomena
- will have the ability to read and understand popularized scientific articles in the press and to conduct discussions about their validity
- will be able to recognize the scientific dimension of a topic, when called upon to make decisions (at national and local level) and express opinions that are scientifically and technologically substantiated
- will be able to evaluate scientific information both in terms of its source and the methods used to produce it.

(from the book's preface)