What is interferometric coherence?
Interferometry is a technique in which electromagnetic waves are superimposed(Interference) to get information.
Interferometry is an outstanding investigative physics technique.
Interference is like the addition of wave functions.
There are constructive type, when waves add together to create a wave of greater amplitude; and destructive type, when they subtract from each other, creating wave of less amplitude.
Coherence length is the propagation distance over which a coherent wave such as an electromagnetic wave maintains a specified degree of coherence .
Two wave sources are said to be coherent if they have a constant phase difference and the same frequency .
It is an ideal wave property that enables stationary interference such as temporary and spatial interference. Despite being ideal, it is now considered to be an essential concept in quantum physics .
This property describes all properties of the correlation between physical quantities of a single or several waves.