A period T is the time required for one complete cycle of vibration to pass a given point . As the frequency of a wave increases, the period of the wave decreases. Frequency and Period are in reciprocal relationships and can be expressed mathematically as: Period equals the Total time divided by the Number of cycles.
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- Tongue, Benson, Principles of Vibration, Oxford University Pres, 2001, ISBN 0-195-142462