By original version: Haade; vectorization: Wjh31, Quibik (Vecorized from File:Interference of two waves.png) [CC-BY-SA-3.0 or GFDL], via Wikimedia Commons
By original version: Haade; vectorization: Wjh31, Quibik (Vecorized from File:Interference of two waves.png) [CC-BY-SA-3.0 or GFDL], via Wikimedia Commons