= Coherence (units of measurement)
{wiki=Coherence_(units_of_measurement)}
Coherence in the context of measurement typically refers to a concept in physics, particularly in optics and signal processing. It describes the correlation between different signals or waves, often in terms of the phase relationship between them. There are two main types of coherence: 1. **Temporal Coherence**: This measures the correlation of a wave's phase over time. It is significant in determining the length of time that a wave can maintain a predictable phase relationship.
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