Constructive and Destructive Interference

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Two waves are said to interfere with each other when they pass though the same medium at the same time; sometimes the waves reinforce each other and sometimes they cancel, depending on their relative phases.


The figure shows waves emerging from two slits that hit a screen and yield bright and dark strips corresponding to constructive and destructive interference.


Contributed by: Enrique Zeleny (March 2011)
Open content licensed under CC BY-NC-SA




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