As is known XX. When at the beginning of the century ALBERT EINSTEIN published his studies of "Special Theory" (1905) and "General Theory" (1916) of Theory of Relativity, there was a change of mentality in the macroscopic world. This theory revolutionized Newton's classical mechanics and we could say that the new Age of Physics was born. XIX. Knowing that at the end of the 20th century laws failed to investigate microscopic phenomena, especially spectra, to describe the macro world, physicists realized that to develop the physics of the microscopic world a new mechanics was necessary. In 1925 ERWIN SCHRODINGER laid the foundation for this new mechanic, born in Uhin-Mechanics. Uhin-Mechanics was the first formulation of Quantum Mechanics. Therefore, Theory of Relativity and Quantum Mechanics, XX. Great achievements of 20th century physics are considered. The dream of any physicist is to get a theory that unites both theories.
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