> - If you hold the end of a string, and wave it up and down, what size makes for > a better 'wave'? It's similar to radio waves, with antenna=string. Aha. It's The luminiferous aether! Warning Will Robinson! Here theyre bee Dragones. It's like the string but without anything like the string. Gargoyle 'Michaelson Morley" Here lmgtfy :-) (benign as he has no knowledge of MM yet :-) ). http://en.wikipedia.org/wiki/Michelson%E2%80%93Morley_experiment http://galileoandeinstein.physics.virginia.edu/lectures/michelson.html Wow - with flashlets even http://galileoandeinstein.physics.virginia.edu/more_stuff/flashlets/mmexpt6.htm Ultimately all roads will lead to James Clark Maxwell. But for now it's done with mirrors. http://scienceworld.wolfram.com/physics/Michelson-MorleyExperiment.html And Algol and Persus andno ghost stars http://www.whfreeman.com/modphysics/PDF/1-1c.pdf So, no string, apparently. YMMV. Russell Russell -- http://www.piclist.com PIC/SX FAQ & list archive View/change your membership options at http://mailman.mit.edu/mailman/listinfo/piclist