Principle of Superposition

The principle of superposition states that when two waves meet the total displacement at a point is equal to the vector sum of the individual displacements at that point.Where two crests meet a constructive interference occurs. The two waves are in phase so their displacements add together and you get reinforcement.Where a crest meets a trough destructive interference occurs. The two waves are in antiphase so the vector sum is zero and you get cancellation.A supercrest is produced where a crest meets a crest and Waves re-inforce each other.The amplitude is the vector sum of the two individual amplitudesA supertrough is produced where a trough meets a trough.Waves re-inforce each other and the amplitude is the vector sum of the two individual amplitudes