refers to the quantal absorption of photons over a range of wavelengths of light used for excitation; different molecules tend to absorb different amounts of radiation over a range of wholly different wavelengths. This would give rise to a spectrum which can be plotted.
Each substance has known specific maximum of absorption. Comparing spectra substances can be identified.
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Each compound has a specific absorption spectra.
Emission spectrum: lines emitted from an atom.Absorption spectrum: absorbed wavelengths of a molecule.
Each substance has known specific maximum of absorption. Comparing spectra substances can be identified.
There are three main types of infrared spectra: absorption spectra, emission spectra, and reflection spectra. Absorption spectra are produced when a material absorbs infrared energy, emission spectra are produced when a material emits infrared radiation, and reflection spectra result from the reflection of infrared radiation off a material.
540 nm
The extinction spectra is actually the measurement of light absorption in different mediums. This spectra is used in chemistry and biochemistry.
George Conrad Tabisz has written: 'Collision-induced effects in the visible and near infrared electronic absorption spectra of oxygen' -- subject(s): Physics Theses, Collisions (Physics), Spectra, Absorption spectra, Oxygen 'Intensity measurements and interpretation of the visible absorption spectrum of liquid oxygen' -- subject(s): Physics Theses, Absorption spectra, Liquid oxygen
Michael Edward O'Byrne has written: 'Combination frequencies and infra-red absorption spectra of certain alkaloids' -- subject(s): Absorption spectra, Alkaloids, Infrared spectra, Spectrum analysis, Tables
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See this site for absorption spectra of many gasses; (check related link)
The lines are at the same frequencies
Donald Roy Geckeler has written: 'A study of the ultra-violet and visible absorption spectra of sodium tetrasulfide' -- subject(s): Sodium compounds, Absorption spectra
Most stars have absorption spectra. In other words, stars possess thin outer layers that allow light to pass through. These layers produce what are called absorption lines. This means the light from the sun and stars are absorption spectra.
David Tytler has written: 'Strong associated C IV absorption in low redshift quasars' -- subject(s): Absorption spectra, Interstellar gas, Quasars, Stellar spectra