absorption spectra definition
A method which measures the ability of particles—solutes—in a solution to absorb light over a range of wavelengths. Mechanism Because each compound absorbs light differently, absorption spectra are compound-specific and can be used to measure solute and solvent concentrations and determine reaction rates. The dark lines represent the colors that are absorbed. Because each type of atom absorbs a unique range of colors, the absorption spectrum can be used to identify the composition of distant substances, such as the gaseous outer layers of stars. The spectrum of electromagnetic radiation that has passed through a medium that absorbed radiation of certain wavelengths.The spectrum used to measure absorption where various wavelengths of light represent different colours of light.absorption spectrum. absorption spectrum - the spectrum of electromagnetic radiation that has passed through a medium that absorbed radiation of certain wavelengths. spectrum - an ordered array of the components of an emission or wave. In the Beer Lambert Law (equation 3) the term IT/Io is called transmittance. This form of spectroscopy has a setup similar to the one used for Absorption. Reflectance spectroscopy is the study of light as a function of wavelength that has been reflected or scattered from a solid, liquid, or gas. The electromagnetic spectrum, broken by a specific pattern of dark lines or bands, observed when radiation traverses a particular absorbing medium and through a spectroscope. The absorption pattern of an element is unique and can be used to identify the substance of the medium. where:E1 is the energy level of the molecule before absorption E2 is an energy level reached by absorption. If all transitions were between only the lowest vibrational levels of the ground state and the first excited state, then an absorption spectrum would consist of narrow, discrete peak. Please contribute to this project, if you have more information about this term feel free to edit this page. This page was last modified on 3 October 2005, at 21:16.This page has been accessed 28,137 times. What links here | Related changes | Permanent link. (General Physics) the characteristic pattern of dark lines or bands that occurs when electromagnetic radiation is passed through an absorbing medium into a spectroscope. An equivalent pattern occurs as coloured lines or bands in the emission spectrum of that medium. An introduction to Absorption / Transmission / Reflection Spectroscopy. Ultraviolet Visible Near-Infra red (UV-Vis-NIR) spectroscopy is useful to characterize the absorption, transmission, and reflectivity of a variety of technologically important materials, such as pigments, coatings, windows, and filters.
The spectrum of electromagnetic radiation that has passed through a medium that absorbed radiation of certain wavelengths.