Gustav Robert Kirchhoff, German physicist, was born on March 12, 1824 in Berlin. He made an important contribution to science in the area of ​​spectroscopy, blackbody radiation emission, the theory of elasticity and the formulation of thermodynamic theories.

He was the son of Friedrich Kirchhoff, lawyer, and Johanna Henriette. He graduated from Konigsberg University in Prussia (present-day Russia) in 1847. He married Clara Richelot, daughter of Richelot, one of his mathematics teachers. In the same year, he moved to Berlin.

In 1845, it formulated laws based on the Energy Conservation Principle and the Electric Charge Conservation Principle. He taught physics at Heidelberg University from 1854 to 1874. He studied the application of mechanical heat theory to physical and chemical processes, a valuable contribution to the theory of light diffraction, reflection, and refraction.

In 1859, with Bunsen began studies of spectral analysis. They discovered the chemical elements cesium and rubidium in 1861. He worked at the University of Berlin from 1874 until the end of his life. He became a partner of the Academy.

He has done other notable works in the field of physics, such as quantum theories, emission power, wavelength and temperature, fluids, hydraulics, optics and electrical circuits.

Kirchhoff died in Berlin, Germany in 1887.