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clipka <ano### [at] anonymous org> wrote:
> Am 25.07.2012 00:45, schrieb Chaanakya:
>
> > Okay. That makes sense. But shouldn't the image change if I give it an IOR of
> > -1.5 (instead of 1.5)? There's no change in the image.
>
> There is, if you pay close attention. For instance, the total internal
> reflections are gone.
>
> That said, as has been mentioned before a non-positive IOR is physically
> nonsense. (Metals have a complex IOR, but that's an entirely different
> story.)
>
> Try something like 1.0, 0.5 or 2.34567.
No natural materials have a negative index of refraction, but metamaterials do -
https://en.wikipedia.org/wiki/Negative_index_metamaterials
Hmmm...I see what you mean. Okay, so essentially there's no transparency, the
image is just being reflected. Thanks for clearing that up!
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