destructive interference

What: "For those who don't know what I'm talking about, say you have a sound wave. The wave length is 1 foot. That means that the compressions are 1 foot apart, "peak to peak." People use a water wave as an analogy, but a sound wave is a compression and rarefaction, which are changes in density of the air. Shorter wavelengths make a higher frequency, and higher compressions/lower rarefactions make it louder. Destructive interference is like when one boat wake passes over another, going in a different direction. Some parts of the two wakes combine to make a super huge wave, and others cancel each other out. Constructive interference is when the two waves join together to make a bigger one, and destructive interference is when they cancel each other out."

Writer: Guest_ken_*

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Date: Jul 30 2013 4:05 PM

What: "Interference occurs whenever waves collide. You've probably seen waves of water cancel each other upon impact. This is destructive interference, which occurs when the rising part of one wave meets the falling part of another. Conceptually, destructive interference is like adding a positive number to a negative number. On the other hand, when waves meet as both are moving up together, interference still occurs but it is constructive , or additive, and the resulting wave crests higher than its parents."

Writer: Paul Pietsch

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Date: Jul 30 2013 4:09 PM

What: "Destructive interference is like constructive interference except in this the waves are seen as cancelling themselves. When the waves are out of phase, i.e. when the crest of one wave coincides with the trough of another, the resulting amplitude would be the difference of the two waves."

Writer: Arham, Dawn, Ruby and Daniel Kwik

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Date: Jul 30 2013 4:11 PM