Focusing x-rays

wirelesswarrior at wirelesswarrior at
Tue Sep 22 21:17:02 PDT 2015

-------- Original Message --------
From: coderman <coderman at>
Apparently from: cypherpunks-bounces at
To: Juan <juan.g71 at>
Cc: cypherpunks at
Subject: Re: Focusing x-rays
Date: Tue, 22 Sep 2015 20:31:26 -0700

> On 9/22/15, Juan <juan.g71 at> wrote:
> > ...
> > Isn't it possible to focus any sort(frequency) of EM wave, at
> > least in theory?
> in theory, with "metamaterials", yes.
> in practice this is akin to the perfect invisibility cloak problem,
> full of devilish details...
> a full spectrum Superlens for any EM freq would be quite handy indeed :)

Most metamaterials perform their magic using plasmas which form inside the material. These plasmas can absorb, reflect, refract, etc. but there are cut-off frequencies related to the energy of the plasma vs. the energy of photons.

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