absorption spectra

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absorption spectrum

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–noun Physics.

the spectrum formed by electromagnetic radiation that has passed through a medium in which radiation of certain frequencies is absorbed.

Origin:
1875–80

Dictionary.com Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2009.
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Medical Dictionary

Main Entry: absorption spectrum
Function: noun
: an electromagnetic spectrum in which a decrease in intensity of radiation at specific wavelengths or ranges ofwavelengths characteristic of an absorbing substance (as chlorophyll) is manifested especially as a pattern of dark lines or bands —compare EMISSION SPECTRUM

Merriam-Webster's Medical Dictionary, © 2002 Merriam-Webster, Inc.
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Medical Dictionary

absorption spectrum n.
The electromagnetic spectrum, broken by a specific pattern of dark lines or bands, observed when radiation traverses a particular absorbing medium.

The American Heritage® Stedman's Medical Dictionary
Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.
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Science Dictionary

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.

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