In heat transfer, Kirchhoff's law of thermal radiation refers to wavelength-specific radiative emission and absorption by a material body in thermodynamic equilibrium, including radiative exchange equ
Gustav Kirchhoff (1824–1887)
Gustav Kirchhoff
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Gustav Robert Kirchhoff was a German physicist and mathematician who contributed to the fundamental understanding of electrical circuits, spectroscopy, and the emission of black-body radiation by heat
Kirchhoff's law of thermal radiation
…reciprocal relations as a consequence of the time reversibility of microscopic dynamics, also known as microscopic reversibility. It was stated by Gustav Kirchhoff in 1860. A body at temperature T radiates electromagnetic energy. A perfect black body in thermodynamic equilibrium absorbs all light that strikes it…
Kirchhoff (left) and Robert Bunsen, c. 1850