From tuning a radio to sending text messages or popping popcorn, people use electromagnetic energy all the time. What is the electromagnetic spectrum and how do people depend on it? This book offers a look into the discovery, history, and uses of microwave energy. You might be familiar with microwaves for their use in microwave ovens, but did you know microwaves are also used in astronomy? Complete with a glossary, color images, intriguing sidebars, and chapter notes, this book is a fascinating look at how electromagnetic radiation is affecting us every day.