absorption spectrum
51absorption edge — noun : a clear cut long wavelength boundary of an absorption band in an X ray spectrum * * * Physics. a discontinuity in the graph of the absorption coefficient of a substance plotted against the wavelength of x rays being absorbed, representing… …
52absorption bands — dark bands in the spectrum due to absorption of light by the medium (a solid, a liquid, or a gas) through which the light has passed. Cf. absorption lines, under line …
53absorption lines — dark lines in the spectrum due to absorption of light by the substance (usually an incandescent gas or vapor) through which the light has passed. Cf. absorption bands …
54absorption lines — Dark lines in a continuous spectrum caused by absorption by a gaseous element. The positions (i.e., wavelengths) of the dark absorption lines are identical to those of the bright lines given by the same element in emission …
55absorption band — A dark gap in the continuous spectrum of white light transmitted by a substance which exhibits selective absorption …
56Water absorption — is a phenomenon in the transmission of electromagnetic radiation through a medium containing water molecules. Water molecules are excited by radiation at certain wavelengths and tend to selectively absorb portions of the spectrum while allowing… …
57Tunable diode laser absorption spectroscopy — (TDLAS) is a technique for measuring the concentration of certain species such as methane, water vapor and many more, in a gaseous mixture using tunable diode lasers and laser absorption spectrometry. The advantage of TDLAS over other techniques… …
58Discrete spectrum — For a mathematically rigorous point of view of discrete spectrum , see decomposition of spectrum (functional analysis). In physics, an elementary (and accurate) explanation of a discrete spectrum is that it is an emission spectrum or absorption… …
59Extended X-Ray Absorption Fine Structure — (EXAFS), or more simply X ray Absorption Spectroscopy (XAS), is an experimental method in physics and chemistry of determining the bonding of solids by analyzing oscillations in x ray absorption versus photon energy that are caused by… …
60Electromagnetic spectrum — The electromagnetic (EM) spectrum is the range of all possible electromagnetic radiation frequencies. [cite web|url=http://imagine.gsfc.nasa.gov/docs/dict ei.html#em spectrum|title=Imagine the Universe! Dictionary] The electromagnetic spectrum… …
