This book is a science text about light for the general reader; it is also an adventure story and a detective story revealing how the secrets of light were uncovered. Readers can share in the thrill of each discovery and learn about some of the myriad applications opened up by these fascinating discoveries, including the telescope, fiber optics, the laser, and even the recent optical detection of gravitational waves from space. With Professor Fortson, distinguished experimental physicist, as your tour guide, follow the journey from the 17th century — when Descartes first calculated the size of the rainbow — to the 20th century, when the quantum theory of light was born. Learn how Huygens, Newton, Planck, Einstein and many other great scientists solved one mystery after another, from the reason underlying the law of refraction to the puzzle of the photoelectric effect. The journey ends with the solution to the most challenging mystery of all: that light is both a wave and a particle — a fascinating finale. Sample Chapter(s) Introduction Chapter 1: Reflection and Refraction of Light Contents: Reflection and Refraction of Light Huygens Founds the Wave Theory of Light Newton Turns His Genius to the Study of Color The Speed of Light 1: Timing Jupiter's Moons. Paris 1671–1676 Speed of Light 2: The Advent of Precision Astronomy 1800: Thomas Young Revives the Wave Theory The Wave Theory Triumphs: Fresnel 1815–1825 Joseph Fraunhofer Observes Spectral Lines Light is an Electromagnetic Wave The Entrance of the Photon and the Birth of Quantum Theory Readership: Students, physicists, and general readers interested in the story about light and its applications.