What are fiber optic cables made of?

Glass

Plastic

Air

Metal

3 answers

Fiber optic cables are primarily made of glass or plastic.

  • Glass fibers are made from silica (a form of sand) and are used in many telecommunications applications due to their high performance and ability to transmit light over long distances.
  • Plastic optical fibers (POF) are made from polymer materials and are generally used for shorter distances and less demanding applications.

Air and metal are not components of fiber optic cables. Air is used in the spaces between fibers in some designs, but it does not make up the fiber itself, and metal may be used in the cable's outer casing for protection, but is not part of the fiber optic medium.

a b c or d

The correct answers would be:

A. Glass
B. Plastic

So, options A and B are both correct. If you need to choose only one option that is commonly associated with fiber optic cables, A. Glass is the most widely used material for traditional fiber optics.