(1901 - 1976)Germanatomic physicist who won the Nobel prize in 1932 for his work in quantum mechanics (the mechanics of atoms, molecules and other physical systems that are subject to the principle of uncertainty). The principle of uncertainty was formulated by Heisenberg in 1927. According to this principle, accurate measurement of one of two related, observable quantities, as position and momentum or energy and time, produces uncertainties in the measurement of the other. —LA Community Access Library and Random HouseDiction of the English Language (Scientology and Ability Glossary) Final approval 18/9/89 HEL - HI