Waves are vibrations that transfer energy from place to place without matter being transferred.
Some waves must travel through a substance. The substance is known as the medium and it can be a solid, liquid or gas. This applies to sound waves and siesmic waves.
Although they may be able to travel through a medium, they do not have to. Waves such as visible light, infrared rays, microwaves and other electromagnetic radiation are like this.
The wavelenth of a wave is the distance between one point of a wave and the same point on the next wave. It does not matter where you measure it, aslong as it is measured on the same point of each wave.
The frequency of a wave is the number of waves produced each second. It…