> Very interesting stuff. By the way, would a stream of electrons moving > at about 1/20th of the speed of light (which if I made my calculations > right means a wavelength of about 500 nM) produce visible, green light, > when approaching an eye or an optical sensor? I had simplified a little ;-) An electron is not a photon, anyway. Peter -- http://www.piclist.com hint: The list server can filter out subtopics (like ads or off topics) for you. See http://www.piclist.com/#topics