Mechanics / Electrodynamics
Ritz, transforming the spectrum of optical radiation, Doppler effect, Belopolsky, Stark, Ritz effect, La Rosa, Zerhellen, Planck's law, Jeans's law, Vavilov, BTR
Translated to English with Google Translate by Thomas E. Miles
From childhood, this proverb-rule teaches us to think about the unity of all the colors of the rainbow, about their smooth, consistent change when shifting along the scale of the light spectrum. At school we learn that not only different colors, but in general all types of electromagnetic radiation (including radio, terahertz, infrared, optical, ultraviolet, X-ray and gamma ranges) are all the same light, electromagnetic waves, differing only in frequency oscillations and wavelength (Fig. 1). But, even realizing the single nature of these radiations, physicists, not understanding the mechanics of the movement of light and its structure, have not yet learned how to effectively transform light from one range to another, smoothly adjusting the radiation wavelength and frequency of the source in the entire range of electromagnetic waves. And the need for this is huge, because each range has to make its own, specific generators, and some ranges, say terahertz, are very poorly mastered.