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Forums
Physics
Quantum Physics
The clarity of Heisenberg uncertainty
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[QUOTE="topsquark, post: 6846614, member: 46422"] When we take a measurement we expect that the measuring device will give us a set of values that are clustered around what we believe the actual value will be. That gives us what we call a variance in the data. This is strictly due to the measuring device. In QM things are a bit different. Even if we had a perfect measuring device we would still get a variance. Say we are dealing with a system that has 4 possible energy states. When we take a measurement we will get a measurement that is one of those states. But we will not get the same measurement each time; we will get a distribution corresponding to how probable each state is likely to be. So we might get 10% in the lowest state, 25% in the next up, 45% in the next up and 20% in the highest. This generates a variance that we cannot get rid of, no matter how good our equipment is. This is what the UP is addressing. -Dan [/QUOTE]
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Physics
Quantum Physics
The clarity of Heisenberg uncertainty
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