Abstract

In 1897 physicists took the first e/m measurements at electrons, the consequence was a revival of the atomistic ideas in physics. The researches in geophysics also contributed to the construction of the modern physics. Four examples are dealt with this essay. 1) In 1899 J. J. Thomson was able to carry out the first direct determination of elementary electric charge with the help of the conformity with the natural laws at the formation of fog, found by C. T. R. Wilson. 2) The cloud-chamber, called after C. T. R. Wilson, was the result of various constructions of for- or cloud-chambers, in it there were shown for the first time the tracks of α- and β-particles. 3) At the exploration of the photoelectric effect of the sunlight (especially of the ultraviolet share) Elster and Geitel made essential preliminary studies for the lightquanta-hypothesis of Einstein. 4) Elster and Geitel detected radioactive substances in the atmosphere and in the soil to be the main source of the atmospheric electricity