I guess you mean a mobile phone – “land-line” phones do have wires.
Mobile phones use radio to talk to a phone tower, which then relays it (by radio again) to other towers until it gets to where it needs to go. Computers in the towers keep track of a “virtual connection” so the right person gets the right message.
Yep, wireless communication is done almost entirely with radio waves, the same way that your stereo picks up radio stations when you listen to music (though phones use a slightly different frequency). There is a lot of sophisticated computer control that goes into making sure all the conversations get to the right place. There are also fibre-optica cables that carry conversations from cell phone towers over long distances (like across oceans), and there are even some phones that have powerful enough transmitters they can communicate with satellites that are hundreds of kilometers up on space!
I guess you mean a mobile phone – “land-line” phones do have wires.
Mobile phones use radio to talk to a phone tower, which then relays it (by radio again) to other towers until it gets to where it needs to go. Computers in the towers keep track of a “virtual connection” so the right person gets the right message.
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What Peter said! 🙂
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Yep, wireless communication is done almost entirely with radio waves, the same way that your stereo picks up radio stations when you listen to music (though phones use a slightly different frequency). There is a lot of sophisticated computer control that goes into making sure all the conversations get to the right place. There are also fibre-optica cables that carry conversations from cell phone towers over long distances (like across oceans), and there are even some phones that have powerful enough transmitters they can communicate with satellites that are hundreds of kilometers up on space!
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