Definition

A type of WAVE in which the surface of the water oscillates verti­cally between fixed points, called NODES, without progression. The points of maxi­mum vertical RISE and fall are called antinodes or LOOPS. At the NODES, the underlying water particles exhibit no vertical motion but maximum horizontal motion. At the antinodes the underlying water parti­cles have no horizontal motion and maximum vertical motion. They may be the result of two equal progressi­ve WAVE TRAINS travelling through each other in opposite direc­tions. Also called stationary wave.