f = frequency = number of waves produced by a source per second, in hertz Hz. T = period = time it takes for one complete vibration or oscillation, in seconds s. A boat at sea bobs up and down as ...

Frequency is calculated as the reciprocal of ('one divided by') the time for one cycle, the period, \(T\). This relationship is shown by the equation \(f= \frac {1}{T}\) Frequency is measured in ...