Social science is a major category of academic disciplines, concerned with society and the relationships among individuals within a society.
Continue reading... Classical and Quantum mechanics are the two main fields of mechanics in physics. Classical mechanics came a few hundred years before Quantum mechanics. Subsequently it is less accurate and less reliable then the more recent mechanic field of Quantum mechanics. Despite being outdated, Classical mechanics can still be used for many everyday problems with bigger and slower moving objects.
The brilliant leap made by Heisenberg's quantum mechanics was made possible by a number of precursors. The BKS (Bohr, Kramers, Slater) theory provided the model that had to be disproved. An American scientist named John Slater had proposed the idea of a virtual radiation field that carried no energy but that was continually emitted and absorbed by virtual oscillators in an atom.