Russian Orthodox cross politics. In the end of the 20th century and the beginning of the 21st century Russian Orthodox Church replaced many traditional Greek Orthodox crosses in Belarus by the Russian Orthodox crosses. The Russian Orthodox cross is depicted on emblems of several Russian ultra-nationalist organizations such as Brotherhood of Russian Truth and Russian National Unity. Russian Orthodox cross Russian Orthodox cross or Orthodox cross, is a variation of the Christian cross known from the 6th century in the Byzantine Empire. The cross has three horizontal crossbeams and the lower one is slanted. Nowadays it is a symbol of the Russian Orthodox
Cross section (physics) to the sum of cross sections over all events. The differential cross section is extremely useful quantity in many fields of physics, as measuring it can reveal a great amount of information about the internal structure of the target particles. For example, the differential cross section of Rutherford scattering provided strong evidence for the existence of the atomic nucleus. Instead of the solid angle, the momentum transfer may be used as the independent variable of differential cross sections. Differential cross sections in inelastic scattering contain resonance peaks that indicate the creation of metastable states and contain information about their energy