Fiber optic systems use thin strands of glass or plastic, known as fiber optics, to transmit data as light signals. This technology allows for high-speed communication over long distances with minimal loss of signal quality. Fiber optic cables are commonly used in internet connections, telephone systems, and cable television. The core of a fiber optic cable is surrounded by a layer called cladding, which reflects light back into the core, ensuring that the signal travels efficiently. These systems are less susceptible to interference compared to traditional copper cables, making them ideal for modern communication networks.