Yeah if you don't want to see anything you need something out side the range 380 to 750 nm (that's the range the human eye typically sees it can vary quite a bit.). longer wavelengths go towards infrared and shorter is towards ultraviolet. A sufficiently short or long wavelength is completely...
well according to this document on 3d laser scanners that goggle indexed here ( 209(dot)85(dot)229(dot)132/search?q=cache:0pA9d4NTiUAJ:faculty.evc.edu/z.yu/nsf2/Module%25203.doc+laser+divergence+as+a+function+of+wavelength&cd=1&hl=en&ct=clnk&gl=us&client=firefox-a ) sorry for the screwed up link...
I believe the effect is called gravitational lensing (wiki article en(dot)wikipedia(dot)org/wiki/Gravitational_lensing you'll need to replace the (dot) with a period)
This reminds me of a scene from an old movie (www(DOT)youtube(DOT)com/watch?v=WINDtlPXmmE&feature=related you'll need to replace (DOT) with a period I have under 10 posts sorry.). Organizers, lawyers and, lobbyists are not the most important parts of a movement to change a governments...