Uncertainty constant from "summary" of Decoding the Universe by Charles Seife
The Uncertainty Principle is one of the cornerstones of quantum mechanics. According to this principle, there is a fundamental limit to what we can know about the universe. This limit is not due to the limitations of our tools or our techniques; it is built into the very fabric of reality. The Uncertainty Principle tells us that there are certain pairs of properties that cannot be simultaneously measured with perfect accuracy. One of the best-known examples of this is the position-momentum uncertainty relationship. If we know the position of a particle with perfect precision, then we have no knowledge of its momentum, and vice versa. The Uncertainty Principle is not a statement about our ignorance or limitations. It is a fundamental feature of the universe, a consequence of the wave-particle duality of matter. This principle tells us that at a fundame...
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