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Quantum Mechanics

There are 4 categories I'm putting in here: History, Wave Function, Uncertainty Principle, and Quantum Entanglement.

Jonathan St. John

on 13 May 2010

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Transcript of Quantum Mechanics

History Quantum mechanics began in 1839 with the discovery of cathode rays by Michael Faraday. Cathode Rays are streams of electrons observed in vacuum tubes. Michael Faraday Quantum Mechanics 1877 - Ludwig Boltzmann suggested the theory of discrete energy elements in a physical system. Ludwig Boltzmann Boltzmann, however, did little else relating to Quantum Mechanics. In 1859, Gustav Kirchhoff stated the problem of the previously unknown "Black-Body Radiation." Gustav Kirchhoff In 1900, a man by the name of Max Planck came up with a hypothesis. His hypothesis stated that energy is radiated, as well as absorbed in quantities divisible by discrete "energy elements." Max Planck Uncertainty Principle What is the - ? The Uncertainty Principle states that some pairs of physical properties cannot be known to arbitrary precision at the same time. Example? Position, or where something is, and Momentum, or the speed of movement. You can say you are at these PRECISE geographical coordinates, but you cannot be moving at the SAME TIME, or you will no longer be at those PRECISE coordinates. According to the Principle's founding father, Werner Heisenburg, it is impossible to determine simultaneously both the position and velocity (momentum) of any electron or other particle with any degree of accuracy.
THE MORE PRECISELY YOU KNOW ONE PROPERTY, THE LESS PRECISELY YOU KNOW THE OTHER. According to others, this is not a statement about the limitations of the observer's ability to measure particular quantities of a system, but it is a statement about the nature of the system itself as was described by the other equations of Quantum Mechanics. Wave Function - is a mathematical equation used in Quantum Mechanics to describe the momentary states of subatomic particles. Commonly applied as a property of particles relating to their wave-particle duality where it is used as Psi (ψ). ψ2 is equal to the chance of finding the subject at a certain time and position. Quantum Entanglement Quantum Entanglement is a property of a quantum mechanical system of two or more objects in which the quantum states of the constituting objects are linked together so that one object can no longer be adequately described without full mention of it's counterpart(s), even if said objects are spatially seperated. The property was known in the early days of Quantum Mechanics, albeit by a different name. Not only was it known, but it was also understood. It is at the heart of the EPR paradox developed by Albert Einstein, Boris Podolsky, and Nathan Rosen in 1935.
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