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On Apr 30, 4:14*am, "Peter" wrote:
I'm preparing an article for a local radio club magazine about the nature of radio and electromagnetic radiation in general. While this is a non mathematical and general descriptive treatment of the subject it is a challenge to make it clear and consistent. I know this group has some expertise on this subject and would appreciate any constructive comment and suggestions regarding the attached article. http://members.optushome.com.au/vk6ysf/vk6ysf/radio.htm Thank you for your time. Regards Peter VK6YSF Peter, the moment you deviate from the ARRL version of intersecting fields and refer to waves is when you are going to lose your audience. Maxwell specifically refers only to two properties inductive and capacitive both of which can be seen as fields. ARRL then states that these two fields interact at right angles to each other which is an interaction of current flow ACROSS a capacitor which is created by the displacement current. Note that waves are not even being mentioned. This is exactly the mechanism of a particle in a crt where the particle collides with a screen and the point it interacts with the screen is governed by two vectors. The only difference between radio and the crt beam is that tho both beams are particles , rotating modulation is only imprinted on the particles occillations or "spin" to form a information carrier for radio purposes. It is still a closed tank circuit which is the propelling engine at the end of all transmitters, except in the radiation cases the closed circuit crosses over itself by passing sideways thru a capacitor created in the form of a eddy current created by the reactionary displacement current flow The idea of using the "wave" term is a carry over from the old days where the aether was viewed as a viscous soup which has now been discarded and replaced by a cloud of free electrons swerling around looking for a diamagnetic place to rest and where the volume of electrons is more than the available places to rest. Why a diamagnetic place to rest? Because diamagnetic means that there is no residual magnetic content within the resting place medium. So Peter, your audience can align visually with the idea of a crt and a beam created by a combination of capacitance and inductance which provides a straight line trajectory which is a central part of radio, and gets away from a viscous water wave movement that does nothing to infer a straight line projection or the energy sinosoidal interaction created by a tank circuit or indeed a pendulum. |