WAVES of Light and Sound Shirley Duke Rourke Educational Media rourkeeducationalmedia com Scan for Related Titles and Teacher Resources
CHAPTER ONE Waves All Around Toss a rock into a pond and watch the water ripple out from the center Listen to your favorite song as you stretch out to dry after a swim Waves surround you Some of them you can see Others are invisible to the eye Every day waves bring light and sound A wave is a disturbance that travels through matter or space It transfers energy from one place to another Waves transfer energy but they don’t carry matter 4
Waves are either electromagnetic or mechanical Scientists call light radiation electromagnetic radiation Light waves can travel through space The Sun is the main source of electromagnetic waves Under high heat and pressure the Sun’s fiery core reduces its mass creating electromagnetic energy 5
