On Wed, 07 May 2003 15:26:48 -0400, Andrew Coppin wrote:

> Here's a simple enough question...
> 
> Is it possible for a transparent substance to be non-reflective? Or are
> all transparent substances inherantly reflective to a certain degree?
> 

	Also the turbulent hot air over a road in summer is an example of
smoothly varying IOR that does not in itself reflect. We cannot see the
turbulence whorls themselves as they do not reflect because of the
smoothly varying IOR.

	The shallow angle mirage is somewhat different phenomenon.

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