Definition of uncertainty principle Uncertainty principle
un•cer•tain•ty prin•ci•ple
We found 3 definitions of uncertainty principle from 3 different sources.
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What does uncertainty principle mean?
WordNet
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| uncertainty principle - (quantum theory) the theory that it is impossible to measure both energy and time (or position and momentum) completely accurately at the same time | ||
| indeterminacy principle | ||
| scientific theory a theory that explains scientific observations; "scientific theories must be falsifiable" | ||
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Wiktionary 
- uncertainty principle (Noun)
Heisenberg uncertainty principle .
Wikipedia 
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The Heisenberg uncertainty principle means that it is impossible to have a particle that has an arbitrarily well-defined position and momentum at the same time.
This uncertainty principle was an important step in the development of quantum mechanics when it was discovered by Werner Heisenberg in 1927.
In quantum physics, the outcome of even an ideal measurement of a system is not deterministic, but instead is characterized by a probability distribution. The larger the associated standard deviation is, the more "uncertain" we might say that that characteristic is for the system.
The uncertainty principle is often confused with the observer effect.
Wave-particle duality.
A fundamental postulate of quantum mechanics, which manifests itself in the Heisenberg Uncertainty Principle, is that no physical phenomenon can be (to arbitrary accuracy) described as a "classic point particle" or as a wave but rather the microphysical situation is best described in terms of wave-particle duality.
The Heisenberg uncertainty principle is a consequence of this picture.
A "helpful analogy" can be drawn between the wave associated with a quantum-mechanical particle and a more familiar wave, the time-varying signal associated with, say, a sound wave. It is meaningless to ask about the frequency spectrum at a single moment in time, because the measure of frequency is the measure of a repetition recurring over a period of time. Indeed, in order for a signal to have a relatively well-defined frequency
