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

Words nearby absorption edge

absorption, absorption band, absorption coefficient, absorption costing, absorption dynamometer, absorption edge, absorption hygrometer, absorption nebula, absorption spectrum, absorptive, absorptivity