What is Crest (physics)?
[[Image:Crest_trough.svg|thumb|upright=1.5]] A '''crest''' is the point on a [[wave]] with the greatest positive value or upward displacement in a [[cycle]]. A [[trough (physics)|trough]] is the opposite of a crest. When the crest and the [[trough]] of two waves of equal magnitude and frequency intersect or collide when in [[phase]] with each other the result is called [[constructive interference]] and the magnitudes double (above and below the line), when 180° out of phase the result is destructive [[interference]] with each other the resulting wave is the undisturbed line that is in the middle of the diagram having zero [[amplitude]]. In other words, the wave crest is called a '''peak'''. ==Related pages== * [[Ocean surface wave]] ==References== *{{Citation | last=Kinsman | first=Blair | title=Wind Waves: Their Generation and Propagation on the Ocean Surface | year=1984 | publisher=Dover Publications | isbn=0-486-49511-6 }}, 704 pages. {{physics-stub}} [[Category:Wave physics]]