J. Grimbert <jgr### [at] atos-groupcom> wrote:
: Ok, I'm nit-picking here, and it's not really a surface but a media, but there
: is such material that increase the strength of light while it is passing 
: through it (and/or even change it radically).

  Changing the frequency of the light is not the same thing as changing it's
strength (ie. amplitude).

-- 
main(i,_){for(_?--i,main(i+2,"FhhQHFIJD|FQTITFN]zRFHhhTBFHhhTBFysdB"[i]
):5;i&&_>1;printf("%s",_-70?_&1?"[]":" ":(_=0,"\n")),_/=2);} /*- Warp -*/

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