"This book is Part B of a series of three books on the Theory of Relativity, focusing on the physical aspect of the theory. [...]. The first chapter provides a brief summary of Part A, but it can also serve as an independent introduction to the mathematics of the Theory of Special Relativity. [...]. The second chapter discusses what a theory of Physics is and what it addresses. It represents a personal philosophical stance and sets the reasoning with which the theory will be approached. The first application is made in the third chapter on Newtonian Physics, followed by the Theory of Special Relativity in chapter four. [...]. In the subsequent chapters, five to eleven, the computational part of the theory is developed with the sequential consideration of various characteristic four-vectors." (from the preface of the edition)