ABSTRACT
The words "positive" and "negative", applied to electric charges, arise out of the need to combine aggregates of charge arithmetically and thus to obtain their net charge: ten electrons and nine protons have a net charge of - 1. The electric force generated near the antenna will thus vary with time, depending on the relative orientations of the two charges in the dipole. Electromagnetic radiation is generated by the periodic acceleration and deceleration of a dipole's charges. These changes in velocity occur when the dipolar charges reach the end of the antenna, slow down, stop, and then go the other way. Several parameters are used to describe electromagnetic radiation. The amplitude is the height of the wave. The fact that most material is electrically neutral masks the fact that it is composed of large quantities of positively and negatively charged particles. If there is an imbalance of those charges in an object, the object is said to be electrically charged.
