1.0GENERAL BACKGROUND
The need to express ideas and feelings and to give tribe information is as old as our evolutionary ancestors.
Of only the attempts made in ancient times to meet this need, the about efficient was the dissemination of information by town criers. some other methods like use of gongs, bells, local guns and bonfires could only carry precise limited and pre-arranged signal such as death, victory or defeat in war, etc.
According to Gascoigne (2001), town criers held an annual argue to discoer which of them could shout a comprehensible message over the longest distance. The cosmea record is less than 100m. When the message demand to reach farther distances, a practical alternative was to stretch out around with the message, but this method is greatly limited by time and space.
The necessity to send information faster and more conveniently led to the discovery of electromagnetic waves (by Henrich Herz in 1887 and its finish in communication by Gulgielmo Marconi in 1895) where neither the sender nor the receiver need move; only the information to be sent is coded in electromagnetic wave form and it is reliable and decoded at the receiver.
It is pertinent to know that electromagnetic waves are ane of the major channels of communication through which man has fill out to know more about his universe; hence electromagnetic waves are galactic and extra galactic (Ugwuanyi, 2006).
This unprecedented procession in our communication technology is also associated with profound changes in our lives-socially, economically, politically, academically and even religiously. It brought about the electronic communication which launched the world into the information age.
1.1 RADIO WAVES...If you want to get a full essay, order it on our website: Ordercustompaper.com
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