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uncertainty principle
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Understanding Heisenberg's uncertainty principle in subatomic particles
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Italian-born physicist Dr. Enrico Fermi draws a diagram at a blackboard with mathematical equations. circa 1950.
Physics and Natural Law
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uncertainty principle

physics
Also known as: Heisenberg uncertainty principle, indeterminacy principle(Show More)
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uncertainty principle, statement, articulated (1927) by the German physicist Werner Heisenberg, that the position and the velocity of an object cannot both be measured exactly, at the same time, even in theory. The very concepts of exact position and exact velocity together, in fact, have no meaning in nature. Ordinary experience provides no clue of this principle. It is easy to measure both the position and the velocity of, say, an automobile, because the uncertainties...

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