|Product #: SED10580I_TQ|
Physical Science: Pioneers of Light and Sound (Enhanced eBook) (Resource Book eBookGrade 4|Grade 5|Grade 6|Grade 7|Grade 8
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Scientists who have studied light and sound over the last few centuries invented many things that we still use today. Thomas Young, for example, proved that light moves in waves and invented prescription eyeglasses. The study of sound has led to inventions like the telephone and hearing aids. Thomas Edison studied both light and sound and invented such things as a long-lasting light bulb, the phonograph, and the first recording machine.
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