Quantum Mechanics & Free Particles: An Analysis

roshan2004
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In past paper, this question was asked "Discuss the quantum mechanical description of the motion of a free particle' What are the points that I need to write for answering this question?
 
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Most probably you should talk about plane waves. Also, one can discuss spin, which is a property of the particle that basically tells you which equation to use. As always, http://en.wikipedia.org/wiki/Free_particle" might be a good place to start.
 
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Thread 'Is a table levitating possible, even at a minuscule probability?'

I am not sure if this falls under classical physics or quantum physics or somewhere else (so feel free to put it in the right section), but is there any micro state of the universe one can think of which if evolved under the current laws of nature, inevitably results in outcomes such as a table levitating? That example is just a random one I decided to choose but I'm really asking about any event that would seem like a "miracle" to the ordinary person (i.e. any event that doesn't seem to...
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