Light is an amazing thing. It allows us to see, sure, but how is it made? This book takes a look at the science behind the creation, travel, and appearance of light. From how fast light travels to the materials that create it, the science behind illumination is fascinating and essential to understanding human life. Informative flowcharts bring the context to life with bright photographs and fact boxes explaining how the human eye sees and reacts to light and how some animals can even see in the dark!