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Two waves shown below with the same amplitude, A, and wavelength, lambda, and traveling in the same direction Initially the sources (dot at the origin) are also at the same point

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Two waves shown below with the same amplitude, A, and wavelength, lambda, and traveling in the same direction Initially the sources (dot at the origin) are also at the same point. The source of the second wave is then displaced by a distance delta x. a) For what values of ox will the superposition of the two waves show total constructive interference? Give at least two values in terms of lambda. b) For what values of delta x will the superposition of the two waves show total destructive interference? Give at least two values in terms of lambda.