Explains the importance of light and sound in the universe and describes what scientists have found out about them.

-- Amazingly in-depth reference books covering physics, chemistry, biology, information technology, earth sciences and astronomy, with up-to-date information on

Audisee® eBooks with Audio combine professional narration and text highlighting for an engaging read aloud experience! Young readers will learn how we send and

Uses activities and experiments to introduce the properties of light and sound.

Sound and light, second edition explores both types of waves-- from how they are generated to how they interact with the world around them.