The **period **of the wave is how long it takes for it to complete *one full oscillation*.

It is calculated using: Period (s) = 1 (number of oscillations)/frequency

**Frequency** is the number of *oscillations per second*

It is calculated using: Frequency (Hz) = 1 (number of oscillations)/period

**Wavelength** and **amplitude **are also important measurements for waves (measured in metres).

**Amplitude **is the largest distance from the *equilibrium position* to a point on a wave
**Wavelength **is the distance between two neighbouring wavefronts, so in transverse waves the distance between crests.

You also need to know the equation involving wavelength and frequency:

**wave speed** = **frequency** x **wavelength**

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