Wavy

A wave is a disturbance that propagates through space or spacetime, often transferring energy.While a mechanical wave exists in a medium (which on deformation is capable of producing elastic restoring forces), waves of electromagnetic radiation (and probably gravitational radiation) can travel through vacuum, that is, without a medium. Waves travel and transfer energy from one point to another, with little or no permanent displacement of the particles of the medium (there is little or no associated mass transport); instead there are oscillations around fixed positions.

For many years, scientists have been trying to work out the problem of energy transfer from one place to another - especially sound and light energy.