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Re: [ATM] Superlens (negative refractive index)

>To get a negative index of refraction, the speed
>through the material needs to be faster than the surrounding
>medium.  If we all lived in glass, the air surrounding us would
>indeed have a negative index relative to what we know of.

I do not get this.
if  n=v1/v2  then n is not negative until one of v's is negative.

If  v1>v2  then n>1 
if  v1<v2  then n<1  

but never negative.

Where  assumption that n is negative if  v2>v1 came from .
Have  I missed something?

Regards Vladimir.

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