Beer Lamber Law scaling

Hi All,

Can someone suggest on what basis a scaling factor of 1e-3 is applied to Beer Lambert Law calculations in MNE and would it differ for infants?

Reference: Line 76:

raw._data[[ii, jj]] = iEL @ raw._data[[ii, jj]] * 1e-3

mne-python/mne/preprocessing/nirs/_beer_lambert_law.py at maint/1.7 · mne-tools/mne-python (github.com)

Thanks,
Gautam