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classes:2009:fall:phys4101.001:q_a_1016

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classes:2009:fall:phys4101.001:q_a_1016 [2009/10/16 07:14] – x500_spil0049classes:2009:fall:phys4101.001:q_a_1016 [2009/10/17 15:05] (current) – x500_choxx169
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 **Main class wiki page: ** [[home]] **Main class wiki page: ** [[home]]
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 ==== East End 10/14/09 3:10 pm ==== ==== East End 10/14/09 3:10 pm ====
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 ===spillane=== ===spillane===
 Consider eq. 2.171 the energies are the same old energies associated with energy quantization. Which occurs at discrete allowed energy levels represented by 2.171. So i feel like the corresponding energy levels represented in figure 2.19 come from this eq. En=n²± Vo this will only give discrete energy levels when this difference is precisely one of the allowed energy states of the system. Leading to complete transparency.  Consider eq. 2.171 the energies are the same old energies associated with energy quantization. Which occurs at discrete allowed energy levels represented by 2.171. So i feel like the corresponding energy levels represented in figure 2.19 come from this eq. En=n²± Vo this will only give discrete energy levels when this difference is precisely one of the allowed energy states of the system. Leading to complete transparency. 
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 ====Schrodinger's Dog 10/15 8:24pm==== ====Schrodinger's Dog 10/15 8:24pm====
 Can anyone tell me why differentiability boundary condition doesn't necessarily hold for a infinite square well? Can anyone tell me why differentiability boundary condition doesn't necessarily hold for a infinite square well?
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 ===Pluto 4ever 10/15 9:41PM=== ===Pluto 4ever 10/15 9:41PM===
 I'm not entirely sure as to why they wouldn't since the only thing we really changed between the two systems is that V is now infinite. Therefore, the chance of a particle escaping the well is non-existent making R=1. Unless, of course, if the walls become transparent. I'm not entirely sure as to why they wouldn't since the only thing we really changed between the two systems is that V is now infinite. Therefore, the chance of a particle escaping the well is non-existent making R=1. Unless, of course, if the walls become transparent.
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 +=== Zeno 10/16 9AM ===
 +That's a very good question... the wave function has to be zero outside the infinite square well, and the slope of the sine function is definitely not zero at the well walls; the transmission coefficient could never be greater than zero for an infinite square well, suggested by intuition as well as eqns [2.169] and [2.171]. Griffiths, on pg 71. eqn [2.121], states that <math>\frac{d \psi}{d x}</math> must be continuous //except// at points where potential is infinite, such as the delta function or the wall of the infinite square well.
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 +===spillane===
 +This wiki keeps boot'en me off when i go to save what i have edited. is there some limited time frame to editing are is this a common problem, seems to be a new one for me.It happens for creating lecture notes as well, frustrating! 
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 +===Yuichi=== You have 15 minutes of inaction.  Then if someone else wants to edit the same wiki, s/he will have a precedence.  but as long as you are typing, you should be able to keep your edit.  If you are losing the edit even if you are not leaving the edit for more than 15 minutes, let me know.  I will check with the systems person. 
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classes/2009/fall/phys4101.001/q_a_1016.1255695277.txt.gz · Last modified: 2009/10/16 07:14 by x500_spil0049

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