Fiber optics can also be spelled as fiber optics is the science of transmitting data, voice and images by the passage of light through thin and transparent fibers. Fiber optics is a long fiber which is usually made of plastic or glass. It consists of two parts, an inner glass fiber core, and an outer cladding. Each of them has different refractive index to bed the incoming light. Copper wire has been replaced by fiber optic in the field of telecommunication. Fiber optics is used in long-distance telephone lines, and it is used to link computers within local area networks. Optical fibers have the diameter of about a strand of human hair and when bundled into a fiber-optic cable, they’re capable of transmitting more data along longer distances and even faster than other mediums. Fiber-optic internet, phone and TV services are the technology provided to homes and businesses. Fiber optic wire contains a few to hundreds of optical fibers within a plastic case. They transfer data signals in the form of light and travel hundreds of miles faster than those used in traditional electrical cables. Since fiber-optic cables are non-metallic, they are not affected by weather that can reduce speed of transmission.