The specific bands of light that pass through and those that get absorbed in a gem or mineral and disperse into the colors of the spectrum. Different gems have different absorption spectra, meaning they are all unique in regard to which colors are absorbed and which pass through. This plays a major role in identifying gems, and can easily distinguish between an imitation gem that has properties almost identical to the real thing. A spectroscope is used to determine the absorption spectra of a mineral.
The detailed dependence on wavelength of the intensity of radiation absorbed by a given medium. Absorption spectra of gases are typically composed of discrete spectral lines and bands of overlapping lines that depend on the molecular or atomic composition of the absorbing substance and that may be used to identify it uniquely. When measuring the absorption spectrum, the medium should be considerably colder than the source of incident radiation (which should also be continuous in wavelength), in order to clearly distinguish the absorption spectrum from the analogous emission spectrum.
The array of absorption lines and absorption bands that results from the passage of radiant energy from a continuous source through a selectively absorbing medium cooler than the source.
A graph of light absorption versus wavelength of light; shows how much light is absorbed at each wavelength.
the specific wavelengths of light absorbed by a gas.
The spectrum of dark lines against a light background that results from the absorption of selected frequencies of electromagnetic radiation by an atom or molecule.
Continuous spectrum interrupted by absorption lines or a continuous spectrum having a number of discrete wavelengths missing or reduced in intensity.
The relationship between wavelengths of light striking a pigment and how strongly the light is absorbed.
a plot of absorption light wavelength versus the amount of light absorbed by the molecules.
the spectrum of electromagnetic radiation that has passed through a medium that absorbed radiation of certain wavelengths
a spectrum created when light with a continuous spectrum is passed through a gas
a spectrum of radiant energy whose intensity at each wavelength is a measure of the amount of energy at that wavelength that has passed through a selectively absorbing substance
A spectrum that contains absorption lines.
A continuum spectrum that displays absorption features.
the spectrum of radiation intensity vs. wavelength or frequency produced when atoms, ions or molecules are excited from low energy states to higher energy states.
Also called spectral window of absorption. The spectrum formed by radiation that has been filtered through a material medium, in contrast to emission spectrum.
a continuous spectrum crossed by dark lines
absorption spectra. Compare with absorption spectroscopy. 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 "fingerprints" in analytical chemistry. The spectrum can represented by a plot of either absorbance or transmittance versus wavelength, frequency, or wavenumber.
It is the absorbed light in a gem or mineral when bands of light passes through. Different gems have different absorption spectra. All are unique about which colors are absorbed and which pass through. This plays a major role in identifying gems and it is easily distinguished between an imitation gem to the real thing. To determine the absorption spectra of a mineral, a spectroscope is used.
Dark lines superimposed on a continuous spectrum.
Spectrum of electromagnetic radiation absorbed by matter when radiation of all frequencies is passed through it.
The spectrum formed when light passes through a cool gas.
A material's absorption spectrum shows the fraction of incident electromagnetic radiation absorbed by the material over a range of frequencies. An absorption spectrum is, in a sense, the inverse of an emission spectrum. Every chemical element has absorption lines at several particular wavelengths corresponding to the differences between the energy levels of its atomic orbitals.
