Our world is largely defined by what we see and hear, but our uses for light and sound go far beyond simply seeing a photo or hearing a song. Lasers, concentrated beams of light, are powerful tools used in industry, research, and medicine, as well as in everyday electronics like DVD and CD players. Ultrasound, sound emitted at a high frequency, helps create images of a developing baby, cleans teeth, and much more. Light and Sound teaches how light and sound work, how they are used in our day-to-day lives, and how they can be used to learn about the universe at large. Read more ASIN B00EOIN178 XRay Not Enabled Language English File size 3.0 MB Page Flip Not Enabled Publisher Chelsea House Pub Word Wise Enabled Grade level 8 - 9 Reading age 14 - 17 years Print length 109 pages Accessibility Learn more Publication date October 1, 2010 Enhanced typesetting Not Enabled