Telecommunications use fiber optics cables for long distance communication. They are also used in medical imaging and mechanical engineering. Internet access is available by using these lines. These tiny strands of glass transmit light and are extremely valued.
Fiber optics are thin strands of very pure glass. They are about the diameter of a human hair. They are arranged in bundles called optical cables. They are used to transmit light signals over long distances. These optical bundles are composed of a core, cladding, and buffer coating. A core is the thin glass center of the cable where the light travels. The cladding is the outer optical material that surrounds the core. The buffer coat is the plastic coating that protects the whole unit from damage.
In order for the cables to work light must travel through the optic cable. The light travel throughs the core and bounces back from the cladding. The cladding keeps the light moving from the point of origin. The cladding does not absorb any light, so the path does not become obstructed. Fiber optics has been used for many centuries, for long distance communication.