Fiber optics ^{1 2 3 4 5}:

• Transmit data, voice, and images by the passage of light through thin, transparent fibers.
• Used in telecommunications to link computers within local area networks.
• Strands of optically pure glass or plastic, as thin as a human hair, that carry digital information over long distances.
• Used in medical imaging and mechanical engineering inspection.
• Replaced older technology of copper wires in telecommunications.