The Heisenberg principles relate to the uncertainty principle. These principles state that it is impossible to precisely determine certain pairs of physical properties, such as an object's position and momentum, simultaneously. Other synonyms for the Heisenberg principles include the indeterminacy principle, uncertainty principle, and the Heisenberg uncertainty principle. These principles were proposed in the 1920s by the German physicist Werner Heisenberg and are fundamental to the field of quantum mechanics. They have wide-ranging implications for understanding the behavior of subatomic particles, and have had profound impacts on physics, chemistry, and other scientific disciplines.