Wave mean characteristics of upheaval that spread out, in a manner of moving wave or ripple and often have to transfer energy. Mechanical wave which occurs in the medium. (which, when modifying the image.Travel and transmission of energy from one point to another point in the medium. Without causing movement of particle position permanently medium. There is no transfer of particles. But there is oscillation (oscillation).However, for electromagnetic radiation and radiation of gravity that can travel in a vacuum, without intermediary!
.The characteristics of waves that will enter from the crest of a wave or a wave crest (the higher value) and abdomen waves (the low down) in appearance, perpendicular to the direction of wave travel. Called "transverse wave" (transverse wave) or parallel to the direction of travel wave.(longitudinal wave).