**Book summary:** ** ** Refreshingly contemporary, this beginning-level introduction to modern physics covers all the important topics of relativity, quantum mechanics, systems with two or more atoms, and subatomic physicsbut does so in a manner that won't overwhelm readers who are new to the subject. Explanations of concepts are exceptionally readable (often enlivened with humor), and an abundance of high-quality worked examples and practice problems give readers the hands-on practice necessary to master applications. ** ** The Space and Time of Relativity. Relativistic Mechanics. Atoms. Quantization of Light. Quantization of Atomic Energy Levels. Matter Waves. The Schrödinger Equation in One Dimension. The Three-Dimensional Schrödinger Equation. Electron Spin. Multielectron Atoms; the Pauli Principle and the Periodic Table. Atomic Transitions and Radiation. Molecules. SolidsTheory. SolidsApplications. Statistical Mechanics. The Structure of Atomic Nuclei. Radioactivity and Nuclear Reactions. Elementary Particles. ** ** For anyone needing an introduction to, or refresher of, modern physics.