what is wavelength
A wavelength is the distance in between the repeating units of a wave, as measured from one point on a wave to the corresponding point in the next unit. For example, the distance from the top -- called the crest -- of one wave unit to the crest of the next is one wavelength.avelength is inversely proportional to the frequency of a wave. In other words, the shorter the wavelength is, the more wave units will pass in a given amount of time. A wave is simply energy that moves through a medium. Outside of the context of physics, ocean waves are an excellent example of how waves work.