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| classes:2009:fall:phys4101.001:q_a_1120 [2009/11/20 18:39] – kuehler | classes:2009:fall:phys4101.001:q_a_1120 [2009/12/19 17:15] (current) – x500_sohnx020 | ||
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| ====Daniel Faraday 11/20 1030am==== | ====Daniel Faraday 11/20 1030am==== | ||
| I am still confused about all the different, equivalent(? | I am still confused about all the different, equivalent(? | ||
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| + | ===Devlin=== | ||
| + | I'm confused by this as well. | ||
| ===David Hilbert' | ===David Hilbert' | ||
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| I was also confused about this as well. Thanks for the input. Now maybe I'll be able to do problem 18 in the homework. | I was also confused about this as well. Thanks for the input. Now maybe I'll be able to do problem 18 in the homework. | ||
| + | ====Jake22 11/22 8:10pm==== | ||
| + | We have seen examples of the nature of coupling between spin and electromagnetic interactions (Stern-Gerlach). For example we know that any charged particle with spin also has a magnetic moment. What can we say about the nature of coupling between spin and strong or weak interactions? | ||
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| + | ====Blackbox 11/23 11am ==== | ||
| + | Can you explain the meaning of (1) and (2) of < | ||
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| + | ===Jake22 11/23 3:50pm === | ||
| + | They are referring to particles 1 and 2, respectively. | ||
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| + | ====ice IX 11/23 18:44==== | ||
| + | On page 182 Griffiths discusses the Stern-Gerlach experiment, and uses the specific case of the silver atom to show that the net spin is s=1/2. This net spin comes from the unpaired valence electron. What happens when the valence contains a pair (or pairs) of electrons, but no unpaired electrons? Will there be no beam splitting in such a situation? | ||
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| + | ====Jake22 11/30 18:34==== | ||
| + | In the Stern-Gerlach experiment, why must we have a beam of relatively heavy atoms in order to construct localized wave packets and treat the motion in terms of classical particle trajectories? | ||
| + | === Blackbox 19:10 === | ||
| + | The experiment can be used to demonstrate that electrons and atoms have intrinsically quantum properties, and how measurement in quantum mechanics affects the system being measured. I think that the purpose of relatively heavy atoms are to prevent the gross deflection of the orbit of a charged particle in a magnetic field and bring out the spin-dependent effect. | ||
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