How Everything Works
How Everything Works How Everything Works
 

QUESTIONS AND ANSWERS
 
Question 1018

What does the inside of a radio look like and what is the difference between AM and FM?
These days, radios just look like electronic circuit boards inside. You'd have some trouble telling the difference between a radio and a computer. AM and FM are both techniques whereby the radio station tells your radio which way to move the diaphragm of its speaker and by how much, in order to make sound. In the AM or Amplitude Modulation technique, the station raises or lowers the power of its radio wave to tell your radio to move its speaker diaphragm toward you or away from you, respectively. The higher the power of the radio wave, the more your radio pushes its diaphragm toward you. In the FM or Frequency Modulation technique, the station raises or lowers the frequency of its radio wave slightly to tell your radio to move its speaker diaphragm toward you or away from you, respectively. The more it raises the frequency of its radio wave, the more your radio pushes its diaphragm toward you.
         

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