Types of Waves
There are two main types of waves, transverse and longitudinal.
In a transverse wave, the vibrations of the wave are at right angles to the direction of travel, a few examples of this type of wave are:
Ripples/waves on the surface of the water.
Electromagnetic waves, eg light waves, microwaves or radio waves.
A way to remember the direction of travel in transverse waves is by using the letter 'r', tRansverse, Right angles.
In a longitudinal wave, the vibrations of the wave travell parallel to the direction of travel, a few examples of a longitudinal wave are:
Longitudinal waves look like this:
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A way to remember the direction of travel is that the lines in this diagram are parallel or with the letter Parallel, seismic P-waves