Question: If two identical waves are spatially separated, each having an intensity of 1.00 W/m 2 , interfere perfectly constructively in a particular location, what is

If two identical waves are spatially separated, each having an intensity of 1.00 W/m², interfere perfectly constructively in a particular location, what is the intensity of the wave at this particular location?

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We know from Superposition and Interference that when two identical waves, which have equal amplitudes X, interfere perfectly constructively, the resulting wave has an amplitude of 2X. Because a wave's intensity is proportional to amplitude squared, the intensity of the resulting wave is four times as great as in the individual waves.

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