An alkali atom in its ground state passes through a Stern--Gerlach ap- paratus adjusted so as to transmit atoms that have thcir spins in the +z direction. The atom then spends time T in a magnetic ficld H in the z direction. At the end of this time what is the probability that the atomn would pass through a Stern-Gerlaclı selector for spins in the -z direction? Can this probability be made equal to unity? if so, how?

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An alkali atom in its ground state passes through a Stern--Gerlach ap-
paratus adjusted so as to transmit atoms that have thcir spins in the +z
direction. The atom then spends time T in a magnetic ficld H in the
z direction. At the end of this time what is the probability that the atomn
would pass through a Stern-Gerlaclı selector for spins in the -z direction?
Can this probability be made equal to unity? if so, how?
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Transcribed Image Text:An alkali atom in its ground state passes through a Stern--Gerlach ap- paratus adjusted so as to transmit atoms that have thcir spins in the +z direction. The atom then spends time T in a magnetic ficld H in the z direction. At the end of this time what is the probability that the atomn would pass through a Stern-Gerlaclı selector for spins in the -z direction? Can this probability be made equal to unity? if so, how? |
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