Wilhelm Wien, German Physicist ( January 13, 1864 - August 30, 1928 )

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Since we can produce all types of light by means of hot bodies, we can ascribe, to the radiation in thermal equilibrium with hot bodies, the temperature of these bodies, and thus every radiation, even that issuing from a phosphorescent body, has a certain temperature for every colour.~Wilhelm Wien

Light Body Colour

According to the kinetic theory of gases, the mean kinetic energy of a molecule is a measure of absolute temperature.~Wilhelm Wien

Energy Measure Theory

As soon as we step beyond the established boundaries of pure thermodynamic theory, we enter a trackless region confronting us with obstacles which even the most astute of us are almost at a loss to tackle.~Wilhelm Wien

Obstacles Loss Step

If, as is the custom, I speak mainly about my own researches, I must say that I was fortunate in finding that not everything had yet been gleaned in the field of general thermodynamic radiation theory.~Wilhelm Wien

Finding Speak Everything