Most modern technology including your cell phone relies on transmitting and detecting radio waves.
How do Radios Work?
Radio is still a popular way to send electromagnetic signals over long distances. A machine that sends radio signals is called a transmitter, while a machine that "picks up" the signals is called a receiver. A machine that does both jobs is a transceiver. When radio signals are sent out to many receivers at the same time, it is called a broadcast.
AM Radio vs. FM Radio
FM radio works the same way that AM radio works. The difference is in how the carrier wave is modulated, or altered.
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- Most modern technology including your cell phone relies on transmitting and detecting radio waves.