All About Wave Equations
Standing waves, also called Stationary waves combination of two waves moving in opposite directions, each having the same amplitude and frequency. A seiche is a standing wave in an enclosed or partially enclosed body of water. Seiches and seiche-related phenomena have been observed on lakes, reservoirs, swimming pools, bays, harbors and seas. Low rhythmic seiches are almost always present on larger lakes. They are usually unnoticeable among the common wave patterns, except during periods of unusual calm. The wave equations derived in above govern the electromagnetic field in a homogeneous, linear medium in which the charge density is zero, whether this medium is conducting or nonconduction. The potential as observed or detected is a harmonic set of a bi-directional longitudinal wave in 2-space. The velocity of propagation v of the scalar wave thus oscillates double-frequently and with opposite phase to the corresponding field.