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uncertainty principle
An important rule in quantum mechanics, first stated by Wernher Heisenberg (and hence also known as the Heisenberg uncertainty principle), which indicates the limit to the precision with which certain pairs of quantities connected with a particle, notably position and momentum, and time and energy, can be simultaneously known. The product of the uncertainties in each case must be greater than h/2π, where h is Planck's constant.
Related category
• PARTICLE PHYSICS
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