On Thu, 08 May 2003 03:48:09 -0400, Andrew Coppin wrote:

> OK, well, a lump of shashed up ice doesn't look reflective at all... but
> take a bit and polish it to give it a nice smooth surface and you find
> that it actually IS reflective. Was thinking, if you have a layer of
> gas, it's surface probably isn't smooth, which might explain why it
> doesn't look reflective.
> 
> If that makes sense.
> 

	Smoothed up it is specular reflection which is a special case of
reflection. The gas has a smoothly varying IOR so it does not have a
reflective surface.

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