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| the acceleration of a falling body in the earth's gravitational field, inversely proportional to the square of the distance from the body to the center of the earth |
| pertaining to a process that occurs within an atom; noting a particle contained in an atom, such as electrons, protons, or neutrons |
| absorption spectrum | |
| —n | |
| 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 | |
absorption spectrum n.
The electromagnetic spectrum, broken by a specific pattern of dark lines or bands, observed when radiation traverses a particular absorbing medium.
| absorption spectrum
The range of frequencies of electromagnetic radiation readily absorbed by a substance by virtue of its chemical composition. See more at atomic spectrum. |