In everyday life, "transparency" usually refers to an object that allows light to pass through, and the naked eye can clearly see what's behind it. From this perspective, fiber optic cables are not completely transparent. This is because the coating and some cladding materials of fiber optic cables are often opaque to protect the fragile glass core from external environmental influences.
However, from the perspective of light transmission, fiber optic cables possess excellent light transmittance. The high-purity glass material of the core ensures that the optical signal experiences almost no attenuation during transmission, thus enabling efficient, long-distance optical signal transmission. This light transmittance is the foundation of fiber optic communication technology, making fiber optic cables an indispensable component of modern communication.
