The 3 Types of Waves
Transverse Wave: Waves that consist of oscillations at a right angle to the propagation of the wave or direction of energy transfer. This means that the waves are moving up and down but not side to side. All waves on the electromagnetic spectrum are examples of transverse waves that oscillate up and down.
Surface Wave: Defined as a mechanical wave that propagates along matter between differing media. An example of this would be the ocean waves being acted on by gravity.
Longitudinal Wave: The displacement of the medium is the same direction or opposing direction of the propagation of the wave. An example would be sound waves. These waves need a medium to travel through, such as sound traveling through air by the vibration of molecules affecting others.