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A comment on Atomic Spins Evade Heisenberg Uncertainty Principle. Parent comment
The UP is not only: "You can't know position and momentum together." It rather: "Position and measurement _cannot be defined_ together."
In classical mechanics, you can imagine a particle being at a certain position with a certain momentum. In quantum mechanics, you cannot.
The UP is not only: "You can't know position and momentum together." It rather: "Position and measurement _cannot be defined_ together."
In classical mechanics, you can imagine a particle being at a certain position with a certain momentum. In quantum mechanics, you cannot.