The Potential of a Field’s Elasticity
What is the origin of a wave? Why is something waving in the first place? To understand that we need to look at the concept of potential energy and how that gets exchanged with kinetic energy. Just like the pendulum of a classic clock. The pendulum determines the pace of the clock. It does so by swinging from left to right at a fixed frequency. The swinging motion is characterized by a continuous exchange of potential energy and kinetic energy. It has maximum potential energy when it is at its top and has a maximal kinetic energy when it is at the bottom (see Fig. 5.1).