# Guide to the Index

 Guide for Newcomer to my Electromagnetic Theory Ivor Catt 26 December 2008 Newcomer to my theory First try hard to grasp "The TEM Wave", or "Transverse Electromagnetic Wave", on which my theories rest. Start with a beam of monochromatic light. If you observe monochromatic light, it is reasonably true to say that as it comes towards you, you receive a sinusoidally altering energy, which varies periodically between high energy and zero energy. Further, each batch of energy is of the opposite polarity to its predecessor and to its follower. Each batch is half the length of one wavelength. It has two lateral dimensions, called the E (electric) field and the H (magnetic) field. The amplitude of these fields gives the magnitude of the amount of energy arriving in each half cycle, which is indicated by the product of E and H. Contrary to the general view, the electric field and the magnetic field of such a travelling sine wave are in fixed ratio, and the one does not morph into the other. Rather, they coexist, with a defined amplitude ratio between them, travelling unchanged at the speed of light. The frequency of light is very high indeed, and the wavelength very small, so it is difficult to study. However, the logic signal from one logic gate to the next is the same as light, but is not subject to very rapid fluctuation like light. My theories start with a TEM Wave which is the same as light except that I specialise in a wave which is guided by two conductors, the easiest guiding conductors to visualise being the inner and outer conductors of a coaxial cable, where the "light" signal is kept within them. It is a step, or pulse, not a sine wave. It is the signal which travels from one high speed logic gate to the next. If the first logic gate changes from outputting a zero to a one, this may be represented by a voltage step from 0v to +5v, with a steady voltage before and after the step. Please study the Animations on Forrest Bishop's website for a TEM Wave guided by two parallel conductors. See the pulse generated at (1). Also see the pulse at (2) and (3) . The electric field lines go between one conductor and the other. The magnetic field lines encircle each conductor. A curious feature of the TEM Wave is that it is not understood by college lecturers, or even by text book writers. In particular, it is not grasped by Sir Michael Pepper , knighted for services to physics, or by Nobel Prizewinner Brian Josephson of the Josephson Junction . They are locked into an incorrect version of the TEM Wave, called by me "The Rolling Wave" which is the version of most academics. The true version of the TEM Wave is "The Heaviside Signal" , an unchanging slab of energy which travels forward at the speed of light, keeping all its characteristics unchanged. It is represented in Figures 2, 4 and 5 in my book.