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- Path: sparky!uunet!dtix!darwin.sura.net!uvaarpa!murdoch!kelvin.seas.Virginia.EDU!crb7q
- From: crb7q@kelvin.seas.Virginia.EDU (Cameron Randale Bass)
- Newsgroups: sci.physics
- Subject: Re: Instant Communications
- Keywords: waves
- Message-ID: <1992Jul31.182117.1640@murdoch.acc.Virginia.EDU>
- Date: 31 Jul 92 18:21:17 GMT
- References: <3978@cruzio.santa-cruz.ca.us>
- Sender: usenet@murdoch.acc.Virginia.EDU
- Organization: University of Virginia
- Lines: 63
-
- In article <3978@cruzio.santa-cruz.ca.us> snarfy@cruzio.santa-cruz.ca.us writes:
- [oodles of stuff deleted]
- >
- > Electromagnetic ``waves'' are not really waves, but positive to
- > negative variations of V amplitude which take place over periods
- > of time and at a given location, usually from a line like
- > radiating source element called an antenna (no reference ,
- > snarfy's dictum). These variations simply LOOK like waves when
- > translated to voltage/time coordinates on an oscilloscope (I hope
- > this is obvious). AC Impedances are really derivations from
- > applied voltage and resulting current just as in static fields.
- > Certainly, I and R values are frequency dependent for any given
- > value of L (Inductance) and C (Capacitance), but you still end up
- > with I = V/z (z evaluated in ohms).
-
- Hate to dampen your fervor, but why don't you take a second and
- think about what a wave might look like if you sat at a point
- and watched it. It might well look like 'positive
- and negative variations of [] amplitude which take place over
- periods of time'. Another small point that you might have missed:
- electromagnetic *waves* satisfy a *wave* equation. So if it 'looks'
- like a wave and acts like a wave ...
-
- > Now , back to current draw. Again, Kirschoff's law states that
- > at a junction I(in) = I(out) . Since a junction is usually
- > considered to be a place where three conducting elements are
- > joined , consider a system of a transmitter 18.63 miles distant
- > from two receiving antennas . At resonance , the receiving
- > antennas each ``drain'' 1/10 of the available output of the
- > transmiter. The rest of the transmitter's energy is ``wasted'' on
- > heating the atmosphere or distant intergalactic nebulas. If one
- > of the antennas is suddenly oriented away from the transmitter,
- > the same mass still stands between the transmitter and the
- > distant galactic nebula and the atmosphere beyond the antenna.
- > The entire resonant system is now detuned ,however, because of
- > the effective removal of one of the inductive elements from the
- > system. If the effect of this detuning took the time necessary
- > for light to traverse the 18.63 miles to register at the
- > transmitter, then you would have a violation of Kirchoff's law
- > which endures for .1 milliseconds ( a virtual eternity ,
- > leptonically speaking).
-
- Another little hint, Kirchhoff's 'law' is not a universal 'law of
- nature', especially when you redefine 'junction' as being spatially
- distributed. As well, we usually apply it to circuits, not
- broadcast systems.
-
- Looking at this another way, you've just 'proved' that a capacitor
- cannot work.
-
- > What more can a snarfy say? If we can break Kirchoff's Law, for
- > even .1 millisecond, what next? Total Anarchy in the physics
- > world ? Heavens forbid!
-
- It is not usually broken when applied correctly, he said dryly.
-
- I think that the law you are looking for is Murphy's.
-
- --
- C. R. Bass crb7q@virginia.edu
- Department of Mechanical and Aerospace Engineering
- University of Virginia
- Charlottesville, Virginia (804) 924-7926
-