Period and Frequency
Period refers to the amount of time, in seconds; a signal needs to complete 1 cycle. Frequency refers to the number of periods in 1 second.
Formula
Period
Period is formally expressed in seconds.
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Frequency and Period are just one characteristics defined in two ways. Period is the inverse of frequency, and frequency is the inverse of period. |
Two signals with the same phase and frequency, but different frequencies: image::period-and-frequency-two-signals-with-the-same-phase-and-frequency-but-different-frequencies.png[]
Frequency has two extremes (physically impossible):
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If a signal does not change at all, it never completes a cycle, its frequency is zero.
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If a signal changes instantaneously, its frequency is infinite (unbounded) and its period is zero.
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frequency is the rate of change with respect to time
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change in a short span of time means high frequency
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change over a long span of time means low frequency
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