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A mechanical wave is created when a source of energy causes a vibration to travel through a medium (substance).
A mechanical wave is a disturbance in matter that carries energy from one place to another.
> The material through which a wave travels is called a medium.
> Solids, liquids, and gases all can act as mediums. > A vibration is a repeating back­and­forth motion. 2
The three main types of waves:
• transverse • longitudinal • surface waves.
They are classified by the way they move through a medium.
Transverse Waves
The medium vibrates perpendicular to the direction of the wave. 4
Longitudinal Waves
A longitudinal wave is a wave in which the vibration of the medium is parallel to the direction the wave travels.
Surface Waves
Ocean waves are the most familiar kind of surface waves. A surface wave is a wave that travels along a surface separating two media.