« on: 01/05/2016 15:15:40 »
All the optical fibres I have seen have been wireless.No, I KNOW I had a point:
They are usually made of glass or plastic.
The wiki page I posted included hair and even water jets as examples.
Meanwhile, here's what wire means.
metal drawn out into the form of a thin flexible thread or rod.
"a coil of copper wire"
an electronic listening device that can be concealed on a person.
"an undercover police informer who was wearing a wire"
So, one is metal and the oterh isn't.
Did you think you had a point?
using radio, microwaves, etc. (as opposed to wires or cables) to transmit signals.
Now, do I need to post the definition of "cable" for you as well? You do know glass, plastic and hair aren't part of the electromagnetic spectrum, right?