Introduction to the Basic Concepts of Modern Physics : Special Relativity Quantum and Statistical Physics This is the third edition of a well received textbook on modern physics theory. This book provides an elementary but rigorous and self contained presentation of the simplest theoretical framework that will meet the needs of undergraduate students. In addition a number of examples of relevant applications and an appropriate list of solved problems are provided.Apart from a substantial extension of the proposed problems the new edition provides more detailed discussion on Lorentz transformations and their group properties a deeper treatment of quantum mechanics in a central potential and a closer comparison of statistical mechanics in classical and in quantum physics. The first part of the book is devoted to special relativity with a particular focus on space time relativity and relativistic kinematics. The second part deals with Schrödingers formulation of quantum mechanics. The presentation concerns mainly one dimensional problems but some three dimensional examples are discussed in detail. The third part addresses the application of Gibbs’ statistical methods to quantum systems and in particular to Bose and Fermi gases. Introduction to Special Relativity Michelson–Morley Experiment and Lorentz Transformations Relativistic Kinematics Introduction to Quantum Physics. The Photoelectric Effect Bohr’s Quantum Theory De Broglie’s Interpretation Schrodinger’s Equation The Potential Barrier Quantum Wells and Energy Levels The Harmonic Oscillator Periodic Potentials and Band Spectra The Schrodinger Equation in a Central Potential Introduction to the Statistical Theory of Matter Thermal Equilibrium by Gibbs’ Method The Pressure and the Equation of State. A Three Level System The Grand Canonical Ensemble and the Perfect Quantum Gas.