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line spectrum

noun, Physics.
an electromagnetic spectrum consisting of discrete lines, usually characteristic of excited atoms or molecules.
Origin of line spectrum
First recorded in 1870-75 Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2018.
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line spectrum in Science
line spectrum  
An image of colored lines or bands of light formed in optical spectroscopy, each line representing one of the frequencies in the spectrum of a light source. The light source is usually broken into individual bands by a prism or a diffraction grating.
The American Heritage® Science Dictionary
Copyright © 2002. Published by Houghton Mifflin. All rights reserved.
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