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Interference is the combination of two or more waves to form a composite wave, based on such principle. The idea of the superposition principle is illustrated in Figure 14.1.1. (d) . Figure 14.1.1 Superposition of waves. (b) Constructive interference, and (c) destructive interference.
Superposition occurs when two (or more) waves of the same type cross each other. Where the waves cross, a resultant wave is formed with a displacement equal to the vector sum of the displacements of the individual waves. There are two types of interference which can occur during the superposition of two waves.
THE PRINCIPLE OF LINEAR SUPERPOSITION. When two or more waves are present simultaneously at the same place, the resultant disturbance is the sum of the disturbances from the individual waves. Constructive Interference.
Principle of Superposition. When two or more waves are simultaneously present at a single point in space, the displacement of the medium at that point is the sum of the displacement due to each individual wave. Constructive and Destructive Interference. Constructive – amplitude of the 2 waves is of the same sign.
THE PRINCIPLE OF LINEAR SUPERPOSITION. When two or more waves are present simultaneously at the same place, the resultant disturbance is the sum of the disturbances from the individual waves. Reinforce each other. destroy each other. Interference of Sound Waves.
Superposition principle. The displacement due to two waves that pass through the same point in space is the algebraic sum of displacements of the two waves. The combination of waves is called interference. Constructive interference – the waves reinforce each other Destructive interference – the waves cancel each other.
Construc3ve and Destruc3ve Interference. Two idencal sinusoidal waves, the posive direcon of an y1(x, t) and y2(x, t), travel along a string in. x axis. They interfere to give a resultant wave y’(x, t). The resultant wave is what is actually seen on the string.
