The main contents of this book include micro and macro thermodynamics, the characteristics of light and its role in modern imaging technology, the unique charm of quantum physics and the magic effects of relativity theory. While reading the book, you will understand the law of molecular motion and the principle of the thermometer, and you will also appreciate the magic of perspective image. This book focuses on the latest scientific research achievements of modern science and technology and displays China's leading achievements in the field of contemporary engineering technology.