Light allows us to see and keeps plants alive. But did you know that it can also cut diamonds or metal, measure a moving object’s speed, and read CDs and DVDs? Readers will learn all about light, from what it is and how it moves through space, to how people have learned to harness its power. They will also discover how people use light to see and conduct experiments to explore how light can be moved and manipulated. Features include eye-catching sidebars; experiments and activities to encourage hands-on learning; glossaries; charts, diagrams and more.