英语词汇“dark line”的英英意思、用法、释义、翻译、读音、例句、短语、词组-英语词典

dark line

noun Physics

An absorption line in an electromagnetic spectrum, appearing as a black line at visible wavelengths.Look at the spectrum of light from a distant object and you will see characteristic bright and dark lines that appear similar to those from earthly material, except for one difference: the positions of the lines are shifted toward the red....

These missing wavelengths are characterized by dark lines in the spectrum.
In 1860 Bunsen and Kirchhoff observed dark lines in the spectrum of a light source passed though burning substances.

单词	dark line
释义	dark line noun Physics An absorption line in an electromagnetic spectrum, appearing as a black line at visible wavelengths.Look at the spectrum of light from a distant object and you will see characteristic bright and dark lines that appear similar to those from earthly material, except for one difference: the positions of the lines are shifted toward the red.... These missing wavelengths are characterized by dark lines in the spectrum. In 1860 Bunsen and Kirchhoff observed dark lines in the spectrum of a light source passed though burning substances.
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