Date: Thu Mar 26 11:27:23 2009 Back to Contents ------------------------------------------------------------------------

Author: cbettis@unlserve.unl.edu Received: from wm-imp-2.unl.edu (wm-imp-2.unl.edu [129.93.2.91]) by uni00ml.unity.ncsu.edu (8.13.7/8.13.8/N.20071210.01) with ESMTP id n2QDn2vD015747 for ; Thu, 26 Mar 2009 09:49:02 -0400 Received: from localhost (localhost [127.0.0.1]) by wm-imp-2.unl.edu (8.13.1/8.13.1) with ESMTP id n2QDq5xQ018289 for ; Thu, 26 Mar 2009 08:52:05 -0500 Received: from lecturdemo.unl.edu (lecturdemo.unl.edu [129.93.36.196]) by wm-imp-2.unl.edu (Horde MIME library) with HTTP; Thu, 26 Mar 2009 08:52:05 -0500 Message-ID:

Subject: Re: CENCO Particle in a Box

Post:

Thanks Ben,

Do you mind if I quote part of your explanation for my description of
this demonstration in my catalog?

Cliff

Quoting Ben_Pearson@vwr.com:

> The energy calculation is based on the calculation of a particle in a
> potential sphere (see the appendix of the instructions for more info). The
> quantum "sphere" or "box" is not empty but filled with a semiconductor. In
> order for the students to understand this they must first start with the
> derivation of a 1D particle in a box calculation, the sphere is basically
> the same physical concept with a different mathematical geometry.
>
> The instructions are written two ways:
>
> 1) A more advanced college physics major can work all the way through the
> derivation from first principles using the spherical geometry.
>
> 2) Entry level modern physics students can do the particle in a box
> derivation and then skip to the final energy calculation.
>
> In summary the fundamental science behind why this experiment works is
> based of the particle in a box theory.
>
>
> Regards,
> Ben
>
>
> Ben Pearson
> --------------------------------------------------
> VWR Education
> Director of Category Management
> --------------------------------------------------
> O: 585.321.9485
> C: 585.978.2780
>
> cencophysics.com, sargentwelch.com, sciencekit.com, wardsci.com
>
> Our new e/m apparatus:
> http://www.cencophysics.com/e-m-apparatus-cenco/p/IG0044394/
>
>
>
>
>
> "Dale E. Stille"
> Sent by: tap-l-owner@lists.ncsu.edu
> 03/25/2009 04:23 PM
> Please respond to tap-l
>
> To: tap-l@lists.ncsu.edu
> cc:
> Subject: Re: [tap-l] CENCO Particle in a Box
>
>
> Cliff,
>
> I actually have that experiment. I have it as 7B13.51 on my website -
> Materials the fluoresce or phosphoresce under UV light. If you think
> quantum dots need their own number, make a proposal and I will bring it
> up to the BIB committee.
> I'm not real clear in my mind as to how this really demonstrates
> particle in a box.....
>
> Later,
> Dale
>
>
> cbettis@unlserve.unl.edu wrote:
>>
>> Do we have a DCS number for this:
>>
>> http://sargentwelch.com/quantum-particle-in-a-box-cenco/p/IG0039296/
>>
>> ?
>>
>
>
>





From tap-l-owner@lists.ncsu.edu Thu Mar 26 11:27:23 2009

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