Fibre optic cables are very different from copper ones. They carry light, not electricity, and have no need for a second cable for a 'return path'.
They can transport much greater amounts of information, and also, on a mile-for-mile basis, they are much less noisy than copper and as a result lose much less information.
Fibre optic cables form the backbone of today's telecommunications system and have played a huge part in making the Internet available around the world.
Visit our interactive demonstration and try it for yourself. A new window will open.