Re: [Phys-l] evanescent microwaves?

[Bernard Cleyet <bernardcleyet@redshift.com>]

On 2012, Feb 23, , at 08:55, 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-5
> 12166.aspx .
> and perhaps a 50 lb brine block would do the trick (search on salt block
> at amazon.com).


Cute!


This would easily afford using different Ns in FTIR.  


Note: I now have created the link to FTIR in my site.

http://www.cleyet.org/


Here:

http://www.cleyet.org/Misc._Physics/Microwave-Optics/

I intend to add more pics, articles, demo. descriptions, etc. today.


bc doesn't know HTML, but knows how to copy and modify.


p.s. Interesting example of how granular reflection is a function of their (grains') relative size WRT the wavelength.