Just the other day I was at my mom's office doing my homework when I glanced at her ancient radio that she has had forever. I've never paid much attention, but then I realized there is a lot of physics involving the old radio. Unlike most radios now days, this radio shows that the FM frequencies are in megahertz and the AM frequencies are in kilohertz. Before I didn't understand how radio stations were able to broadcast their programs and music, but now I know that they send the sound through specific frequencies. Whenever we change the tuning of the radio to the station we want to listen to, we allow the sound waves of that frequency to enter the radio and be played out by the speakers. The sound waves enter the radio through the antenna and then the radio distinguishes the information and sends it out through the speakers.
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