line-spectrum

line spectrum

noun Physics.
an electromagnetic spectrum consisting of discrete lines, usually characteristic of excited atoms or molecules.


Origin:
1870–75

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American Heritage
Science Dictionary
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.
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