----- Original Message ----- > > > I have red and blue flashlights, with which, I will project red/blue light onto the viewing screen. > > I have bad news for you. I surmise that your optics textbook was written > by Plato, and unfortunately some of his ideas have been found to be > wrong. > > How, exactly, are you going to project this red/blue light? > > Brian Chandler I believe I stated how in my original query, but I have rephrased it above. I don't believe, however, that Plato, or any of his compatriots, ever discussed optics. Stephen -- This email was brought to you by Gns2000.Com http://www.gns2000.com