HOW TO SEND 25000PHONE CALLS IN A HAIR THIN WIRE?
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In a land line, voice is converted into electrical signals by a microphone and sent through wire. The sound is reproduced by the speaker at the other end. Now we have modern technology called fiber optics. Here voice or any digital data is first converted into electrical signals and then into light signals(laser or infra red) using electronic element. It is then sent through glass fibers (strands). We k...
