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--- classes:2009:fall:phys4101.001:q_a_1120 [2009/11/23 11:06] – x500_sohnx020
+++ classes:2009:fall:phys4101.001:q_a_1120 [2009/12/19 17:15] (current) – x500_sohnx020
@@ Line 28: / Line 28: @@
 ====Daniel Faraday 11/20 1030am====
 I am still confused about all the different, equivalent(?) terminology we used on Wednesday to describe spin eigenfunctions. Can someone explain what they mean and/or how it is that they are equivalent to each other?
+===Devlin===
+I'm confused by this as well.
 ===David Hilbert's Hat 11/20 11am===
@@ Line 39: / Line 42: @@
 ====Blackbox 11/23 11am ====
-Can you explain the meaning of (1) and (2) of <math> S = S^(1)+S^(2) </math> on page 184.
+Can you explain the meaning of (1) and (2) of <math> S = S^{(1)}+S^{(2)} </math> on page 184.
+===Jake22 11/23 3:50pm ===
+They are referring to particles 1 and 2, respectively.
+====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?
+====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? How heavy must they be?
+=== 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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