All our lives we have been immersed in a colorful sea of light. We rely on its guidance to explore the world around us. But what is light? Where does it come from? How does it move? What are colors? Why is the sky blue? What causes highway mirages? And what can light tell us about the universe? If you've ever asked yourself one of these questions, then you have come to the right place. This book is a brief and gentle introduction to the physics of light and electromagnetic radiation in general. No prior knowledge is required to enjoy this journey into the fascinating world of light.For the table of contents, feel free to use the Look Inside feature. From the author of "The Book of Forces", "Introduction to Stars: Spectra, Formation, Evolution, Collapse" and the "Great Formulas Explained" series.