On Fri, 18 Sep 2009 13:52:11 +1000, you wrote: >In reply to John Fields's message of Tue, 15 Sep 2009 19:30:45 -0500: >Hi, >[snip] >>Same problem with the electric airport cars; the distance between the >>transmitters and receivers and the inverse square law, which our dear >>Mother Nature invokes in order to keep us from blowing up the universe, >>makes the field strength fall off so quickly as the distance between >>them increases. >[snip] >Apparently for resonant transmission, it's not an inverse square law, but >rather >linear with distance.
--- Picture a point source in space radiating at a single frequency in all directions. Picture now two identical antennas tuned to that frequency, with one separated from the source by twice the distance of the other. Will the signal intercepted by the far antenna be half that intercepted by the near one? No. It'll be 1/4.
