What Type of Wave Needs a Medium to Travel?
When it comes to waves, there are two main types: longitudinal and transverse. Longitudinal waves are those which move in the same direction as the source of the wave and transverse waves are those which move perpendicular to the source. In order for a wave to travel, it needs a medium through which it can pass. In most cases, this medium is a solid, liquid, or gas, such as air or water....