On Thu, 08 May 2003 06:17:03 -0400, Warp wrote:

> Andrew <ast### [at] hotmailcom> wrote:
>> If something was truly non-reflective, it would be perfectly invisible
> 
>   A transparent object which refracts light is never invisible.
 
	Observable and invisible are different things. A gravitational lens is
invisible but observable. The hot air over a road is invisible but
observable by the turbulent distortion.

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