The proposed will be a book covering the fundamental physics of the most abundant energy resource available to human society--solar energy. Similar to other technologies, the first step to achieving success is to have a firm understanding of the basic science of solar energy and how to utilize it. Many good books have been published on solar energy since the 1970s. However, these books tend to concentrate on specific engineering aspects of solar energy applications. More recently, several books about the physics of solar sells have been published, but none of these books detail the general and basic physics of solar energy. This book is designed to give the reader this solid footing, which will be the basis of research and the development of new solar engineering technologies in the upcoming years.