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Radio Waves
Beginning of essay
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
communicat ....
Middle of essay
.... 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..... |
| Number of words: 803 |
Approximate pages: 3 |
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