Diffraction
Progressive reduction in wave height when a wave spreads into the shadow zone behind a barrier after the wave has passed its end. (US Army Corps of Engineers, Low Cost Shore Protection: A Property Owner's Guide, 2004)
Progressive reduction in wave height when a wave spreads into the shadow zone behind a barrier after the wave has passed its end. (US Army Corps of Engineers, Low Cost Shore Protection: A Property Owner's Guide, 2004)