> "8. Some high tech materials can bend light opposite to the direction
> that is normally seen. The discovery could lead to making higher quality
> lenses."
>
> Huh?
>

I haven't found out what that means yet BUT I took it to mean that the
normal behaviour expected from refractive index didn't occur. One can
speculate how this might be. It may be a multi layer interference effect or
yet another form of quantum voodoo that can be described but, like all true
quantum voodoo, not explained. (If you can explain it it's not quantum
mechanics).

> (Will we have black LEDs next?)

I have some apparently black LEDs. And I can't see the light when they
operate. But that's quite normal for IR LEDs :-)

You can obtain UV LEDs which are arguably Black light LEDs.

So, yes :-)



        RM

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