23 Sep
2015
23 Sep
'15
3:24 a.m.
On Wed, 23 Sep 2015 02:59:18 +0000 (UTC) jim bell <jdb10987@yahoo.com> wrote:
But only a dweeb doesn't know that X-rays cannot be focussed. (With one very obscure exception not applicable here. Find it and get an "attaboy!". )
Isn't it possible to focus any sort(frequency) of EM wave, at least in theory?
Its called Grazing Incidence