Uses and Abuses of Mobile Phone
When Scotsman Alexander Graham Bell invented the telephone in 1876, it was a revolution in communication. For the first time, people could talk to each other over great distances almost as clearly as if they were in the same room. Nowadays, though, we increasingly use Bell’s invention for emails, faxes and the internet rather than talking. Over the last two decades a new means of spoken communication has emerged: the mobile phone. The modern mobile phone is a more complex version of the two-way radio. Traditional two-way radio was a very limited means of communication. As soon as the uses moved out of range of each other’s broadcast area, the signal was lost. In the 1940s, researchers began experimenting with the idea of using a number of radio masts located around the countryside to pick up signals from two-way radios. A called would always be within range of one of the masts; when he moved too far away from one mast, the next mast would pick up the signal. (Scientists referr...