Radio Waves

Below is a free term papers summary of the paper "Radio Waves." If you sign up, you can be reading the rest of this term papers in under two minutes. Registered users should login to view this term paper.

Term Paper Title	Radio Waves
# of Words	789
# of Pages (250 words per page double spaced)	3.16

Radio Waves

Radio Waves

     In the modern society, radio is the most widely used medium of
broadcasting and electronic communication : it plays a major role in many areas
such as public safety, industrial manufacturing, processing, agriculture,
transportation, entertainment, national defense, space travel, overseas
communication, news reporting and weather forecasting. In radio broadcasts, they
use the radio waves which can be both microwaves and longer radio waves. These
are transmitted in two ways: amplitude modulation (AM ) and frequency modulation
( FM ). These two kinds of wave have many differences.

     Radio waves are among the many types of electromagnetic waves that
travel within the electromagnetic spectrum. Radio waves can be defined by their
frequency (in hertz, after Heinich Hertz , who first produced radio waves
electronically), which is number of times they pass through a complete cycle per
second; or by their wavelength, which is determined by the distance (by meters)
that is traveled from the crest of one wave to the crest of the next.

     Radio frequencies are measured in units called kilohertz, megahertz, and
gigahertz.   (1 kilohertz = 1000 hertz : 1 megahertz = 106 hertz, 1 gigahertz =
109 hertz). All radio waves fall within a frequency range of 3 kilohertz, or
3000 cycles per second to 30 gigahertz. Within the range of frequencies, radio
waves are further divided into two groups or bands such as very low frequency (
VLF 10-30 kHz ), low frequency (LF 30-300 KHz), medium frequency ( MF 300-3000
KHz), high frequency ( HF 3-30 MHZ) and very high frequency ( VHF 30-300MHZ).

     Amplitude modulation is the oldest method of transmitting voice and
music through the airwaves is by amplitude modulation. This is accomplished by
combining a sound wave from a microphone, tape, record, or CD with a "carrier"
radio wave. The result : a wave that transmits voice or programming as its
amplitude ( intensity ) increases and decreases. Amplitude modulation is used by
station broadcasting in the AM band and by most international short wave
stations.

     Frequency modulation is another way to convey information, voice , and
music on a radio wave is to slightly change, or modulate, the frequency. The
main advantage of FM broadcasting is of it is static free. But the drawback to
FM is since the frequency is varied, station takes up more room on the band.
Frequency modulation is, of course, used on the FM band. And it is used for
"action band" and ham transmission i...

This is not the end of the termpaper! Register below to see the complete version of this term paper.

Membership Plans	Credit Card	Check

1 month membership

3 month membership (You Save 50%)

6 month membership (You Save 67%)

Copyright © 2002-2007 Mid Term Papers. All rights reserved. This term papers website is used for research purposes only.
If you have forgotten your username or password, please click here.
If you like to cancel your account, please click here.

1 - 2 - 3 - 4 - 5 - 6 - 7 - 8 - 9 - 10 - 11 - 12 - 13 - 14 - 15 - 16 - 17 - 18 - 19 - 20 - 21 - 22