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Frequency

From Encyclopædia

Frequency is one of the primary characteristics of a wave (see WAVES AND WAVE MOTION). It refers to all kinds of waves, including light, sound, and mechanical waves, and is the number of times the wave varies through a complete cycle in a given unit of time. Frequency is denoted by either the symbol f or the Greek letter nu and is commonly expressed in hertz (Hz); 1 Hz equals 1 cycle per second. The frequency of a sound wave determines its pitch; that of a light wave determines its color.

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