Waves About Waves Put in the simplest terms, a wave is something that wiggles in space and time.
Waves extend from one place to another.
How often the vibration occurs is the frequency. The distance the wave has traveled between maximums is the wavelength. One of the most interesting property of waves is that when two waves pass through each other, their effects are added together. This is called interference. There are many more wave properties we can't get into for lack of space.