Definition: Wavelength is the distance between corresponding points of a wave separated by one period. It is commonly denoted
, and given by:
where
is the wave speed and
is the frequency.
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:
Synonym:
References: https://doi.org/10.1073/pnas.2208729119
Related terms: Peak Wavelength, Source, Emitter, Chromophore, Optical Window
