Re: [Phys-l] evanescent microwaves?

["Spagna Jr., George" <gspagna@rmc.edu>]

I one is a little more adventurous, make molds and fill them with resin or paraffin to make the prisms for this experiment/demo.  We used paraffin for the setup at Rensselaer when I was there (a long time ago!).

**********************************************************
"The hard right has no interest in religion except to manipulate it."       
                                                    - the Rev. Billy Graham, 1981
**********************************************************

Dr. George Spagna
Physics Department
Randolph-Macon College
P.O. Box 5005
Ashland, VA 23005-5505

phone: (804) 752-7344
fax: (804) 752-4724
e-mail: gspagna@rmc.edu
http://faculty.rmc.edu/gspagna/public_html/index.html


-----Original Message-----
From: phys-l-bounces@carnot.physics.buffalo.edu [mailto:phys-l-bounces@carnot.physics.buffalo.edu] On Behalf Of Daniel L Macisaac
Sent: Thursday, February 23, 2012 2:18 PM
To: Forum for Physics Educators
Subject: Re: [Phys-l] evanescent microwaves?

For salt blocks near you:
http://tsc.tractorsupply.com/search?zone=16&env=&w=salt+block
and stores
http://www.tractorsupply.com/StoreByStateView?storeId=10551&catalogId=10001

Dan M

On Feb 23, 2012, at 12:45 PM, brian whatcott wrote:

> Building on Jeff's interesting input: 50 lb animal licks are to be had 
> in any country district They come in 3 general varieties:
> A salt block (white)
> A mineralized salt block (brown)
> A protein loaded mineral block (brown)
>
> These are listed in ascending price starting around $6 or $7 in these parts.
>
> Brian W
>
>
> On 2/23/2012 10:55 AM, Jeffrey Schnick wrote:
> > We did this experiment as an undergraduate modern physics laboratory 
> > exercise using a salt block in the early 80s at Oregon State.  It is 
> > my understanding that the apparatus was originally created as part of 
> > a master's thesis project (from the appearance of the apparatus--many 
> > years earlier).  My recollection is that the block was in the shape 
> > of a cube of edge length about 1 foot, cut along a plane containing 
> > two opposite edges of the cube, thus creating two 45 degree prisms 
> > (that is the cross section of each was a a right isosceles triangle).  
> > Given that OSU has a huge agricultural program, I am assuming the 
> > cube was a livestock salt block. Looks like slightly smaller blocks 
> > are inexpensive and easy to obtain.  See
> >
> > <http://farm-and-pet.hardwarestore.com/110-609-salt-minerals/salt-block-512166.aspx>  .
> > and perhaps a 50 lb brine block would do the trick (search on salt 
> > block at amazon.com).
> >
> >
> > > -----Original Message-----
> > > From: phys-l-bounces@carnot.physics.buffalo.edu [mailto:phys-l- 
> > > bounces@carnot.physics.buffalo.edu] On Behalf Of brian whatcott
> > > Sent: Thursday, February 23, 2012 8:16 AM
> > > To: phys-l@carnot.physics.buffalo.edu
> > > Subject: Re: [Phys-l] evanescent microwaves?
> > >
> > >
> > > Try again<sigh>
> > >
> > > http://www.physics.usyd.edu.au/teach_res/projects/proj6/evanescent.p
> > > df
> > >
> > >
> > > On 2/22/2012 9:39 PM, brian whatcott wrote:
> > > > On 2/22/2012 2:31 PM, Bill Wehrbein wrote:
> > > > > Have any of you performed the experiment (e.g., Albiol et al, Amer.
> > > J. Phys, Feb 1993) exploring evanescent waves produced by the 
> > > typical introductory lab microwave set ? Any tips or suggestions for 
> > > updating and improvement? Thanks!
> > > > > Bill Wehrbein, Nebraska Wesleyan University
> > > > Thanks to uSydney for making the paper easily accessible.
> > > >
> > > > <www.physics.usyd.edu.au/teach_res/projects/proj6/evanescent.pdf>
>
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