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The Uncertainty Principle

Zentralbild Prof. Dr. phil Werner Kar. Heisenberg, Physiker, geboren 5.12.1901 in Würzburg, Professor für theoretische Physik, Direktor des Max-Planck-Instituts für Physik in Göttingen, Nobelpreis für Physik 1932 (Aufnahme 1933) 39049-33

Zentralbild
Prof. Dr. phil Werner Kar. Heisenberg,
Physiker, geboren 5.12.1901 in Würzburg, Professor für theoretische Physik, Direktor des Max-Planck-Instituts für Physik in Göttingen, Nobelpreis für Physik 1932 (Aufnahme 1933)
39049-33


Zentralbild
Prof. Dr. phil Werner Karl. Heisenberg,
Physicist, born 05.12.1901 in Würzburg, Professor of Theoretical Physics, Director of the Max Planck Institute for Physics in Göttingen, Nobel Prize in Physics in 1932
(recording 1933)
39049-33

The position and momentum of a particle cannot be simultaneously measured with arbitrarily high precision. There is a minimum for the product of the uncertainties of these two measurements. There is likewise a minimum for the product of the uncertainties of the energy and time.

This is not a statement about the inaccuracy of measurement instruments, nor a reflection on the quality of experimental methods; it arises from the wave properties inherent in the quantum mechanical description of nature. Even with perfect instruments and technique, the uncertainty is inherent in the nature of things.


Important steps on the way to understanding the uncertainty principle are wave-particle duality and the DeBroglie hypothesis. As you proceed downward in size to atomic dimensions, it is no longer valid to consider a particle like a hard sphere, because the smaller the dimension, the more wave-like it becomes. It no longer makes sense to say that you have precisely determined both the position and momentum of such a particle. When you say that the electron acts as a wave, then the wave is the quantum mechanical wavefunction and it is therefore related to the probability of finding the electron at any point in space. A perfect sinewave for the electron wave spreads that probability throughout all of space, and the “position” of the electron is completely uncertain

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Source: Hyper Physics

Find out about: Super Position

There is more to come. Things will get very technical.

One comment on “The Uncertainty Principle

  1. Pingback: The Anthropic Principle and Quantum Physics (Anthropic Principle 3) | MKT Library

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This entry was posted on May 14, 2015 by in Physics and tagged , , .

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