
A wave is a
disturbance in a medium.

It carries energy from one
point to another without transferring matter.

There are two main types:
Longitudinal and Transverse.

Sound waves are an example
of longitudinal waves.

Typically, sound waves
travel at about 340 meters per second in air at room temperature and
pressure.
We use three ways of representing the propagation of waves:

Dots.

Colour maps.

Line graphs.
WAVELENGTHFREQUENCY RELATION
Frequency,
f, wavelength,
λ,
and wave velocity,
v, are
mathematically related by:
v =
f λ
POINT SOURCES, INVERSE SQUARE
LAW
The energy carried by waves
that radiate uniformly in all directions from a point source decay as the
inverse of the square of the distance from the point source. This is known
as the inverse square law.
