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Radio Waves - Research Paper

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. ...

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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 ...

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Radio Waves. (2006, October 5). Retrieved November 28, 2024, from http://www.essayworld.com/essays/Radio-Waves/53421

"Radio Waves." Essayworld.com. Essayworld.com, 5 Oct. 2006. Web. 28 Nov. 2024. <http://www.essayworld.com/essays/Radio-Waves/53421>

"Radio Waves." Essayworld.com. October 5, 2006. Accessed November 28, 2024. http://www.essayworld.com/essays/Radio-Waves/53421.

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PAPER DETAILS

Added: 10/5/2006 04:16:10 AM
Category: Science & Nature
Type: Premium Paper
Words: 803
Pages: 3

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