Sally M. Walker 
Investigating Light [PDF ebook] 

The sun, lightbulbs, and flickering fires all bring light to our world. But have you ever watched light rays moving? Or seen how light rays reflect off objects? Now you can! Explore light with the fun experiments you’ll find in this book. As part of the Searchlight Books(TM) collection, this series sheds light on a key science question-How Does Energy Work? Hands-on experiments, interesting photos, and useful diagrams will help you find the answer!