Interference

Simultaneous action of two wave motions at the same point. The result is dependent upon the relative phases of the two interfering waves, as well as upon their wave lengths and amplitudes. Thus, e.g., if two waves of the same period and amplitude meet in opposite phases, they will mutually destroy each other; if they meet in the same phase, IMG:content-0787.png:[merged small][graphic] IMG:content-0788.png:[graphic][merged small][merged small] Inter genital Plates, In the echinoid shell, between the genital plates.