principle-superposition

principle of superposition

noun Physics.
any of several physical laws that the resultant of similar vector quantities at a point is a function of the sum of the individual quantities, especially the law that the displacement at a point in a medium undergoing simple harmonic motion is equal to the sum of the displacements of each individual wave.
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principle of superposition

noun
1. (geology) the principle that in a series of stratified sedimentary rocks the lowest stratum is the oldest 
2. the displacement of any point due to the superposition of wave systems is equal to the sum of the displacements of the individual waves at that point; "the principle of superposition is the basis of the wave theory of light" 
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