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All About Light And Sound: Physical Science (Science Readers),New Olney Uptodate Guide For The ParrotLight And Sound Help Us Recognize Objects And Noises! This Fascinating Book Will Allow Readers To Understand How Vibrations, Radiant Energy, Wavelength, Frequency, Amplitude, Reflection, Optics, And Sound Waves Help Us To See And Hear The World Around Us. Through Vivid Images, Helpful Facts, Intriguing Sidebars, An Accommodating Glossary And Index, And A Handson Lab Activity, Readers Will Be Engaged From Beginning To End!