We think you are located in South Africa. Is this correct?

Period And Frequency

Don't get left behind

Join thousands of learners improving their science marks online with Siyavula Practice.

Sign up here

9.4 Period and frequency (ESACV)

Period

The period of a wave is the time taken by the wave to move one wavelength.

Frequency

The frequency of a wave is the number of wavelengths per second.

The period of a longitudinal wave is the time taken by the wave to move one wavelength. As for transverse waves, the symbol T is used to represent period and period is measured in seconds (\(\text{s}\)).

The frequency \(f\) of a wave is the number of wavelengths per second. Using this definition and the fact that the period is the time taken for \(\text{1}\) wavelength, we can define:

\[f = \frac{1}{T}\]

or alternately,

\[T = \frac{1}{f}\]