absorption spectrum


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spectrum

 [spek´trum] (L.)
1. the series of images resulting from the refraction of electromagnetic radiation (e.g., light, x-rays) and their arrangement according to frequency or wavelength.
2. range of activity, as of an antibiotic, or of manifestations, as of a disease. adj., adj spec´tral.
absorption spectrum one obtained by passing radiation with a continuous spectrum through a selectively absorbing medium.
broad-spectrum effective against a wide range of microorganisms.
visible spectrum that portion of the range of wavelengths of electromagnetic vibrations (from 770 to 390 nanometers) which is capable of stimulating specialized sense organs and is perceptible as light.

ab·sorp·tion spec·trum

the spectrum observed after light has passed through, and been partially absorbed by, a solution or translucent substance; many molecular groupings have characteristic light absorption patterns, which can be used for detection and quantitative assay.

absorption spectrum

The range of light a substance absorbs, plotted as a function of energy, frequency or wavelength.

ab·sorp·tion spec·trum

(ăb-sōrp'shŭn spek'trŭm)
The spectrum observed after light has passed through, and been partially absorbed by, a solution or translucent substance. Many molecular groupings have characteristic light absorption patterns, which can be used for detection and quantitative assay.

absorption spectrum

that wavelength of the light spectrum which is absorbed by a pigment. For example, chlorophyll (see Fig. 9 absorbs red and blue light and thus appears green. See ACTION SPECTRUM.
References in periodicals archive ?
4, the absorption spectrum of the structure varies with the angle of incidence (from 0[degrees] to 60[degrees]) under the irradiation of p-polarized and s-polarized light.
To calculate the absorption spectrum of the Neel ensemble of antiferromagnetic particles, one must also perform averaging over a random quantity of the uncompensated magnetic moment, for example, according to the Gaussian distribution of parameter [beta] with average magnitude [bar.[beta]] = 1 and width [[sigma].sub.[beta]]:
In Figures 2(a) and 2(b) the calculated position of the quantum transitions that form the absorption spectrum are marked by vertical lines from below.
Results confirmed that the two wavelengths (1064nm and 532nm) of Q-switched Nd:YAG laser technique have the potential to produce Ti[O.sub.2] NPs with a peak of absorption spectrum in 290nm, spherical particles shape, suitable particle size (30-110 nm at 1064nm and 10- 90 nm at 532nm) and negative zeta potential (-14.81mv).
The donor (emit fluorescence) should have more fluorescence quantum yield, (2).Overlap (>30%) of the fluorescence emission spectrum of the donor with the absorption spectrum of the acceptor.
Anthocyanin Absorption Spectrum. Presence of anthocyanin pigments was determined by measuring their absorbance spectra using UV-Vis spectrophotometer (Shimadzu UV-1800, Japan).
Figure 3 showed that Pd-Ag with water shows similar absorption spectrum like that of palladium nitrate, indicating that no charge transfer has taken place in presence of water and this observation which did not support the formation of Pd-Ag complex.
The optical absorption spectrum of the compound is recorded at RT on a Carey 5E UV Vis-NIR spectrophotometer in mull form in the range of 200-2000 nm.
In particular, there are two types of transitions: indirect ([approximately equal to] 0.6 eV) and direct ([approximately equal to] 0.8 eV) and we will verify their existence in the absorption spectrum of the obtained films.
A selection of the analysed wavelengths in spectroscopic measurements is depended on a few factors, such as absorption spectrum of the given gas, optoelectronic elements availability of the desired spectral characteristics as well as absorption spectra of each gas in the mixture.
The ions absorb some of the light from the white dwarf, making an "absorption spectrum" that was observed using the Hubble Space Telescope.
Mie theory provides a good method of analyzing the optical absorption spectrum of a single spherical nanoparticle of arbitrary size [17].