Light, which permeates all normal existence, has been the subject of wonder from earliest time. Without it, what would the world be like? In this excellent text, every aspect of light and its effects are lucidly explored. The nature of light and its sources, light in its various manifestations, man's perception of light are described in detail. Dramatically vivid photographs illustrate this text by the author of Orbit, and questions at the end of each chapter stimulate inductive application. Of particular interest to science students, this book should also find many interested readers among the non-initiate.