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absorption edge

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noun Physics.
a discontinuity in the graph of the absorption coefficient of a substance plotted against the wavelength of x-rays being absorbed, representing the minimum energy necessary to free electrons from particular shells of the atoms of the substance.
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Also called absorption discontinuity, absorption limit.

Origin of absorption edge

First recorded in 1925–29
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2022

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