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Sounds are produced by the vibrations of material objects, and travel as a result of
momentum transfer when air molecules collide. Our subjective impression' about the frequency of a sound is called pitch. High pitch has high vibration frequency, while low pitch has a low vibration frequency. A pure musical tone consists of a single pitch or frequency. However, most musical tones are "complex summations" of various pure frequencies - one characteristic frequency, called the fundamental, and a series of overtones or harmonics Younger people can usually hear pitches with frequencies from about 20 hertz (infrasonic) to 20,000 (ultrasonic) hertz. We can't hear above 20,000 hertz or below 20 hertz (ultra and infrasonic waves).
Light is both part particle and part wave. Light is "the electromagnetic radiation that may be perceived by the human eye". It consists of photons, which are massless bundles of concentrated electromagnetic energy. Light's lower frequency is red, and the......
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Title: H.S. Level - Sound And Light Waves
Approximate Word Count: 494
Approximate Pages: 2 (250 words per double-spaced page)
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