A wave is a disturbance that propagates from the place it was created.$^3$
For example, a water wave is the ripple the spreads out when ever the surface is disturbed.$^3$
It is important to note that in a wave the particles them selves do not move, they vibrate. The particles transfer their energy to the next particle and that results in the propagation of the wave.$^1$ $^3$
Waves are classified into two types based on the type of particle movement.$^1$
These types are:$^1$
These are the kind of waves that comes to mind when you think of a wave. A water wave, for example, is a kind of transverse wave.$^1$
The particles within this waves vibrate perpendicular to the direction of propagation.$^1$
Longitudinal waves are when the particles move parallel to the direction of propagation.$^1$
However this is also represented using a displacement-time or displacement-distance graph.
