Сегодня родился Умов Николай Алексеевич
On January 23, 1846 Umov Nikolay Alekseevich was born. This is a Russian physicist and a thinker. Umov introduced in science such fundamental concepts as speed and the direction of the movement of energy, energy density of this point of the environment, spatial localization of a stream of energy for the first time. In the 1900th years he carried out the analysis of many formulas of Gauss to theories of terrestrial magnetism that allowed to define century changes of a magnetic field of Earth.