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What happens when two wave pulses collide?. Interference – Two waves “collide,” but pass through each other undamaged – Superposition Principle: when.

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Presentation on theme: "What happens when two wave pulses collide?. Interference – Two waves “collide,” but pass through each other undamaged – Superposition Principle: when."— Presentation transcript:

1 What happens when two wave pulses collide?

2 Interference – Two waves “collide,” but pass through each other undamaged – Superposition Principle: when waves interfere with each other, the resulting wave is the sum of their amplitude at each point.

3 Destructive Interference

4 Constructive Interference

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7 crests aligned with crests waves are “out of phase”

8 Destructive Interference crests aligned with troughs waves are “out of phase”

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10 Interference – Add the amplitudes of the waves Above axis is positive, below is negative – The result is the superposition of the waves – Constructive  wave gets bigger – Destructive  wave gets smaller

11 What if we send a bunch of pulses down the spring and let them reflect back? How will they interfere with one another?

12 Standing waves Animation

13 Parts of a Wave 246 x(m) 3 -3 y(m) Crest/antinode Trough/antinode node

14 Wave Parameters 3 -3 246 x(m) y(m) amplitude wavelength

15 You can make a standing wave on a spring. – Figure out how to make different standing waves. – What would a graph of wavelength vs. # of antinodes look like? – Collect the data to make this graph. Wavelength # of antinodes


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