A wave is formed by some basic components which are:

Being A to *wave amplitude*.

It is called *wavelength*, and expressed by the Greek letter lick (λ), the distance between two ridges or two consecutive valleys.

We call *wave period* (T) the time elapsed before two consecutive ridges or valleys pass a point and *wave frequency *(f) the number of consecutive ridges or valleys that pass through the same point in a given unit of time.

Therefore, the period and frequency are related by:

The internationally used unit for frequency is Hertz (Hz) where 1Hz is equivalent to passing a ridge or valley in 1 second.

For the study of two-dimensional and three-dimensional waves the concepts of:

**wave front:**it is the border of the region not yet reached by the wave with the region already reached;**wave radius:**You can define the wave radius as the line that starts from the source and is perpendicular to the wavefronts, indicating the direction and direction of propagation.