On radio it is written AM, FM1, FM2. What is the full form of AM, FM. Also tell !


Question:

On radio it is written AM, FM1, FM2. What is the full form of AM, FM. Also tell me at what number the chicago?

news come, at what numbers are world news and clasical songs. And english songs.
Serious reply only
TOM


Answers:

AM stands for amplitude modulation, and FM stands for frequency modulation. A radio wave sent out from the transmitter has a set frequency, like 940 khz or 90.3 mhz. AM stations modulate or vary the amplitude or volume of that wave within the frequency range of sound, from about 20 hz to about 8,000 hz. FM stations modulate the frequency or pitch of that wave within a wider range, from about 20 hz to about 20,000 hz, which is the limit of human hearing. To get FM stereo (two channel) sound, a secondary wave is imposed upon the first. Your radio or receiver removes the radio wave, leaving only the audio signal, which is then amplified and sent to the speaker(s).


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