Transmittance: The transmittance is the fraction of radiant intensity transmitted by a sample, T = I/I0 where T is the transmittance and I, I0 are the radiant intensity of the radiation after and before passing through the sample. The percent transmittance is the transmittance times 100%.

 

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Transmittance: The transmittance is the fraction of radiant intensity transmitted by a sample, T = I/I0 where T is the transmittance and I, I0 are the radiant intensity of the radiation after and before pa . . . View Full Definition

Absorption Spectrum: A plot that shows how much radiation a substance absorbs at different wavelengths. Absorption spectra are unique for each element and compound and they are often used as chemical 'fingerprin . . . View Full Definition

Absorbance: (A, D, E) optical density; extinction; decadic absorbance. A measure of the amount of light absorbed by a sample. The absorbance (A) equals minus the base-10 log of the transmittance.