The third university year of One Physics Book, a free, coherent physics course from grade 1 to the end of a bachelor's degree, following the French Licence 3 physics programme. 27 chapters: Lagrangian and Hamiltonian mechanics, continuum mechanics and elasticity; relativistic kinematics and dynamics, and covariant electromagnetism; the formalism of quantum mechanics, the hydrogen atom, spin, perturbation theory and scattering; statistical physics from the microcanonical ensemble to quantum statistics and phase transitions; electromagnetism in matter and solid-state physics; nuclear physics, particle physics and astrophysics.
Each chapter gives definitions, laws with derivations and methods, then graded exercises and a weekend problem: 324 exercises and 27 problems, all with full solutions. It builds on Years 1 and 2 of the same series, and individual chapters can serve as the text for an upper-division course in analytical mechanics, quantum mechanics, statistical physics or solid-state physics. Read online or download the PDF, free and without an account, in English, French, Dutch, Spanish, Portuguese, Hindi, Arabic and Indonesian.
Drafted with Anthropic's Claude models (text, exercises, solutions and translations) and reviewed by Benjamin Virrion, engineer and PhD in mathematics; 26 illustrations are AI-generated (OpenAI) and labelled in the image credits; every edition passes automated build and consistency checks. Sources, history and error reports: https://github.com/bvirrion/one-physics-book