This book covers 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 its use‎.‎ The subject matter of this text is designed to give the reader this solid footing‎,‎ which will be the basis of research and the development of new solar engineering technologies‎.‎ Homework problems and exercises to reinforce the contents along with a solutions manual for instructors‎.‎