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# Wave Interference

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 Sub Topics It is quite common to see two water waves meet, combine together for a moment, pass through each other and then reform as they were before. You can see this in the sea or in your own bath. This particular effect is called superposition and it deals with the interference between waves. The principle of superposition states that if two or more waves of the same type are in the same place at the same time, their wave displacements add. When the waves completely add together we get constructive interference; when the waves completely cancel each other we get destructive interference.

## Principle of Superposition

Superposition is the principle of interference. Superposition is defined as the combination of waves which originates from different sources. In other words, the total magnitude of the wave is the the sum of all individual magnitudes of the waves which originates from different sources.
If the wave is same phase the constructive interference will takes place. If it is in out of phase, destructive interference will take place. The details about these two are described in the next section.