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Unformatted text preview: 1 superposition When more than one wave is present, the displacement of the medium is the sum of the displacements due to each individual wave. Informal statement: waves add up Principle of superposition The superposition of 2 or more waves is called interference Constructive interference : These two waves are in phase. Their crests are aligned. Their superposition produces a wave with amplitude 2a Destructive interference : These two waves are out of phase. The crests of one are aligned with the troughs of the other. Their superposition produces a wave with zero amplitude 2 Interference: space and time Is this a point of constructive or destructive interference? What do we need to do to make the sound from these two speakers interfere constructively? standing waves Two waves traveling in opposite direction interfere with each other. If the conditions are right , their interference generates a standing wave....
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This note was uploaded on 10/30/2011 for the course PHYS 207 taught by Professor Winnokur during the Spring '06 term at University of Wisconsin.
- Spring '06