Good, now put back the context you've omitted, take your antenna specs and prove it with numbers. Solutions that will make the fly-by birds go poof or yourself arrested and your equipment seized do not count.
Shachar Shemesh wrote: > Michael Vasiliev wrote: >> The power of the signal is inversely proportional to the square of >> distance. > That is not precisely accurate. > > An undirected point source of EM radiation (or any other type of > energy) transmits energy that expands on a sphere from the point of > transmittal. The surface area of the sphere expands proportionally to > R^2. Therefor, the law of conservation of energy dictates that the > energy received over a constant area receiver (say, a 1 cm^2 energy > receiver) will decline proportionally to the square of the distance > from the transmitter. > > As a side note - does that prove that our universe only has three > dimensions? > > However, if our transmitter is directional, and you keep the > transmitter beam focused, so that it does not expand, there is no > reason for the energy to almost not discard at all. Of course, the > medium through which you transmit the energy may absorb some of it > (assuming it is not a vacuum), and it may disperse some more of it, > but there is no reason to get 1/R^2, or even 1/R. > > Shachar > -- > Shachar Shemesh > Lingnu Open Source Consulting Ltd. > http://www.lingnu.com > -- Sincerely yours, Michael Vasiliev _______________________________________________ Linux-il mailing list Linux-il@cs.huji.ac.il http://mailman.cs.huji.ac.il/mailman/listinfo/linux-il
