Phones

It goes without saying that phones are one of the most useful devices ever invented. Yet, almost none of us knows how they function. These devices, that we all take for granted, allow us to dial a few digits and talk to anyone on the planet in a matter of seconds.

Unlike other electronic gadgets that evolve at an amazing rate, the technology behind telephones stayed the same for over 100 years. You can take a 1930s phone, connect it to the wall jack and it will work just like any other.

Mobile phones, however, are based on a different technology that implements radio waves invented by Nikola Tesla in 1880s. So, a mobile phone is basically a very sophisticated radio device that incorporates the basic technology of the telephone invented by Alexander Graham Bell in 1876. It is remarkable how these 2 work together to make our lives so easier.