Definition: Wavelength is the distance between corresponding points of a wave separated by one period. It is commonly denoted lambdA, and given by:In fNIRS, wavelength refers to the specific range of light wavelengths used to measure changes in chromophore concentration in the brain. Typically these are between 650-900 nm.

Alternative definition:



Related terms: Peak Wavelength, Source, Emitter, Chromophore, Optical Window  

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