Constructive interference occurs when the amplitudes of two waves combine to produce a wave with a smaller amplitude.

Waves come in a simultaneous sine and cosine curves. They can also move together either vertically or horizontally. There are two kinds of interference waves; the destructive and constructive interference. Destructive interference is when one wave moves up and the other wave moves down, adding the two waves would result into zero net movement. Constructive interference on the other hand is when one wave that moves up and the other moves down, adding them results in a much larger wave than the original two waves. The answer is false because addition of two waves must result to a higher wave in a constructive interference.