How is light like waves in the ocean? What causes a mirage? How do eyes our translate light into the things we see? What are some forms of light than we cannot see? This title looks at the fascinating nature of light, how it's measured, and how it behaves. The book examines some of the exciting ways that light is being used in medicine, astronomy, and communications. It also discusses what the study of the most distant light in space tells us about the origin and future of the universe.