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This article is in honor or the opening of the latest session of the Supreme Court. There is a famous law in Physics known as Heisenberg’s uncertainty principle. If you have only heard of it in the mainstream press, you may have heard of it incorrectly. Some think it means that you cannot tell where anything is – like your car keys, or the last pair of socks in the dryer, only worse. The actual scientific definition is more complicated, and it says that you cannot simultaneously know the position and the momentum of a particle with infinite precision; in...

Why Quantum Mechanics Is Not So Weird after All Richard Feynman's "least-action" approach to quantum physics in effect shows that it is just classical physics constrained by a simple mechanism. When the complicated mathematics is left aside, valuable insights are gained. PAUL QUINCEY The birth of quantum mechanics can be dated to 1925, when physicists such as Werner Heisenberg and Erwin Schrödinger invented mathematical procedures that accurately replicated many of the observed properties of atoms. The change from earlier types of physics was dramatic, and pre-quantum physics was soon called classical physics in a kind of nostalgia for the...

<p>Warner Heisenberg would understand the current media confusion surrounding the progress of the war. About 80 years ago, the German physicist postulated a theory — known as the Uncertainty Principle — that in sub-atomic physics the observer becomes part of the observed system. Through the act of measurement the physicist becomes himself part of observed reality. Regarding subatomic particles, he argued, the act of measuring one magnitude of a particle — mass, velocity or position — causes the other magnitudes to blur. So that, in his words: "The more precisely the position is determined, the less precisely the momentum is known."</p>

    "Exact uncertainty" brought to quantum world   00:01 27 April 02   Exclusive from New Scientist Print Edition   Exact uncertainty sounds like a contradiction in terms, but that is what governs the quantum world, according to a theoretical physicist who has created an improved version of the famous Heisenberg uncertainty principle. Heisenberg worked out that there is a degree of inherent fuzziness to the world. You cannot measure both the position and the momentum of any particle with perfect accuracy. The better the accuracy of your momentum measurement, the more uncertain your position measurement must be, and vice versa....