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From: palmer@uw-june (David Palmer)
Newsgroups: net.physics
Subject: Re: No pencil/no paper problem.
Message-ID: <983@uw-june>
Date: Sun, 12-Feb-84 18:47:15 EST
Article-I.D.: uw-june.983
Posted: Sun Feb 12 18:47:15 1984
Date-Received: Wed, 15-Feb-84 05:04:32 EST
References: <165@hou2g.UUCP>
Organization: U. Washington, Computer Sci
Lines: 25

bitals cascade into
    unpaired states of lower energy?

                                               Jim 

The Pauli principle states that no two Fermions can be in the same
state at the same time (same state == same wave function, same type of
particle, and same spin direction.)  However, the quantum mechanics of
the system says that a particle may only be in certain discrete states
at any one time, and those states depend on the direction of the
particle's spin.  In a magnetic field, a particle with spin up cannot
have the same wave function as a particle with spin down, because the
magnetic field acts on the particles differently.

                                    David Palmer