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Chemistry
A branch of physical science that is concerned with the study of matter and energy and how they interact.
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Chemistry > Spectroscopy 
wavenumber
Chemistry; Spectroscopy
The reciprocal of wavelength (in cm-1); and is the x-axis unit commonly used in Mid-IR and Raman vibrational spectroscopy. It is proportional to energy, larger wavenumber value = ...
wavelength
Chemistry; Spectroscopy
The period of a wave or the distance required for a wave to repeat; and is the x-axis unit commonly used in Near Infrared (NIR) vibrational spectroscopy.
spectral resolution
Chemistry; Spectroscopy
The ability to resolve two peaks in a spectrum: the minimum difference between two lines in a spectrum that can be distinguished. It can also be defined as the full width at half ...
spatial resolution
Chemistry; Spectroscopy
The smallest physical distance between measured positions on the sample.
absorbance
Chemistry; Spectroscopy
Absorbance = A = - log10 (IT/I0)Where I0 is the incident radiation and IT is the transmitted radiation.
reflectance
Chemistry; Spectroscopy
Mathematically identical to transmission, but applicable to reflected radiation. Often applied as %R.
transflection
Chemistry; Spectroscopy
A reflection absorption measurement in the mid or NIR range using a mirror (mid) or ceramic disk(NIR).
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