No, I meant what I wrote. The tilde indicates 2 approximations : a.. the unknown location of the reflector on the moon b.. your reduction of the moon-earth distance to 1.000 light-second. RB ----- In experimental demonstrations, don't you allow for approximations, to make the math simple.. We are not discussing the reality, but the possible reality as I showed when I simplified it all to a theoretical firing range. Sometimes I get the impression that you try to win/force an argument by hiding behind what you hope are high sounding complex physical/mathmatical formula and expressions. A true Scientist who wishes to teach, prepares his "lesson" to the entry level he assesses the student to have. Not belittle their feeble attempts at understanding nature by forever finding some weakness that you can exploit for your ego perhaps? Perhaps you have difficulty at the practical applied physics level of the engineer. You should not feel any shame about that.. Christians understand.. [Robert Bennett] Are you stressed, Philip? Why so bitter? Calm down.... belly up to the bar - have a drink on me. You approximated the Moon distance to 1.00 light-second, an error of 28%, then corrected me for using an approximate value of 30 km, an error you introduced. If you didn't know ~ means "approximately equal to", well, now you do. Why is learning something new a problem? Should I ignore misstatements because you may be offended at correction? Should I avoid using precise notation for the same reason? I use what I've been trained to use. The alternative is to use arm-waving qualitative rhetoric that never reduces to testable quantitative predictions. (Sorry, Allen) A suggestion: forego the remote psychoanalysis. You could answer this perhap false impression of mine, by going back to the ongoing debate you are having with Paul re orbits and the effect of increasing and decreasing speed on the object, putting it in a simple circular orbit situation, in terms that all here, be he priest or philosopher can understand.. [Robert Bennett] V*V = GM/r is all you need to know => Newton's law for free fall. It was Neville who first introduced this, not I. Philip. From: Robert Bennett No, I meant what I wrote. The tilde indicates 2 approximations : a.. the unknown location of the reflector on the moon b.. your reduction of the moon-earth distance to 1.000 light-second. RB ----- [Robert Bennett] Yes, If NASA could see and aim the laser directly at the reflector, the beam would miss the Moon by ~ 30 km. Yes, you mean of course miss the reflector, not the moon, coz the moons bigger. And if they hit the reflector, theyd miss the reflection by 30 km.. Philip.