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Kirchhoff's laws

(Kirchhoff's three laws of spectroscopy)
(laws regarding the source of spectral lines)

Kirchhoff's laws (Kirchhoff's three laws of spectroscopy) indicate the source of spectral lines.

  1. A hot solid, liquid, or dense gas produces a continuous spectrum.
  2. A hot thin (i.e., low density) gas produces emission lines.
  3. A continuous spectrum passing through a cold thin gas produces absorption lines.

The developer, physicist Gustav Kirchhoff, also devised other groups of laws now with his name, e.g., "Kirchhoff's laws" of circuits.


(physics,EMR)
https://en.wikipedia.org/wiki/Gustav_Kirchhoff#Kirchhoff.27s_three_laws_of_spectroscopy
http://hosting.astro.cornell.edu/academics/courses/astro201/kirchhoff.htm
https://www.e-education.psu.edu/astro801/content/l3_p6.html

Referenced by:
absorption line
emission line

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