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Re: [Phys-l] evanescent microwaves?

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
12166.aspx .
and perhaps a 50 lb brine block would do the trick (search on salt block

-----Original Message-----
From: [mailto:phys-l-] On Behalf Of brian whatcott
Sent: Thursday, February 23, 2012 8:16 AM
Subject: Re: [Phys-l] evanescent microwaves?

Try again <sigh>

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.


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