What is the primary purpose of a fiber optic cable?

The primary purpose of a fiber optic cable is to transmit data as light signals. This technology utilizes thin strands of glass or plastic fibers to convey information through light pulses, which can travel vast distances with minimal signal loss. Light signals are significantly faster than electrical signals in traditional cables, enabling high-speed data transmission that is essential for modern communication systems, such as the internet and telecommunications.

Fiber optic cables are designed to efficiently guide light along their length, allowing for high bandwidth and the ability to carry multiple signals simultaneously. This capability is particularly beneficial in environments demanding high data rates and reliability, such as in data centers and telecommunication networks. Additionally, since optical signals are less susceptible to electromagnetic interference, fiber optics can maintain signal integrity over longer distances compared to traditional copper cables.

The other options focus on transmission methods that are not characteristic of fiber optic technology, which highlights why they do not serve as the correct answer.