A dark line in a spectrum that represents the absorption of energy at a particular wavelength of light. Each element on the periodic table absorbs energy at unique wavelengths. Astronomers identify which elements are present in an object, and other information about the object, by measuring these absorption lines. See also emission line spectral line
A line of finite width in the absorption spectrum. Absorption lines are characterized by their central wavelength, line intensity, and line width.
Dark narrow lines that represent absorption of energy at a particular wavelength of light. Each element on the periodic chart absorbs energy at specific wavelengths of light; this unique pattern looks like a bar code. See also: wavelength
The absence or reduction of radiation at one or several adjacent wavelengths in a continuous spectrum.
In atmospheric radiative transfer, a discrete frequency at which an energy transition of an atmospheric gas occurs due to the absorption of incident solar radiation. The line width depends on broadening processes, the most important of which are natural, pressure (also known as collision), and Doppler broadening.
a spectral line (a very narrow set of colors) at which an object shines less brightly than at nearby colors
A dark line in a spectrum. Produced by the absence of photons because they were absorbed by atoms or molecules.
A dark line at a particular wavelength. of a spectrum, formed when a cool, tenuous gas between a hot radiating source and the observer absorbs electromagnetic radiation of that wavelength. more! and more
Colors missing in a continuous spectrum because of absorption of those photons by some intervening material.
A dark line in a continuous spectrum caused by absorption of light. Each chemical element emits and absorbs radiated energy at specific wavelengths, making it possible to identify the elements present in the atmosphere of a star or other celestial body by analyzing which absorption lines are present.
Dark line in an otherwise continuous bright spectrum, where light within one narrow frequency range has been removed.
absorption of radiation which results from the passage of radiant energy from a continuum source through a cooler, selectively absorbing medium
a more or less narrow range of wavelengths in a spectrum that is darker than neighboring wavelengths. Absorption lines are seen in stars.
a dark line or band at a particular wavelength on a spectrum, formed when a substance between a radioactive source and an observer absorbs electromagnetic radiation of that wavelength. Different substances produce characteristic patterns of absorption lines.
A region of low intensity at a particular wavelength in a spectrum, formed when a cool, tenuous gas between a hot radiating source and the observer absorbs electromagnetic radiation of that wavelength. The opposite effect is seen as an emission line.
A region of the electromagnetic spectrum, limited in frequency and wavelength, from which electromagnetic radiation has been removed, so that the intensity of the radiation falls below that of the neighboring spectral regions.