This module provides background material on electromagnetic radiation. You will need to understand the concepts and terms presented in this module for the later material in this course. You should progress through the module in the order below. There are no online answers to the study questions, but you may contact the instructor if there is something you do not understand. Each page below will have navigation button at the bottom of the page that will allow you to return here (the index) or go to the previous or next page.
All students should go through the following six web pages.
What is EM Radiation - A wave?
What is EM Radiation - A particle?
The following three pages concern the theory behind different causes of refraction. We suggest that you go over this material now. You should review the free electron section when we discuss HF transmissions and review the bounded electron section when we discuss VHF, UHF, EHF transmissions.
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Last Update: 1/12/2004