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Interference

When two waves collide, they can either amplify the signal creating a brighter pulse or interfere with one another. When they are in phase they amplify the signal in a phenomenon called constructive interference.When the signals that are out of phase collide, destructive interference occurs and the signal is weakened (see Figure 3.12).

Figure 3.12Figure 3.12 Interference can amplify or diminish a signal.

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