Which of the following is used in a fiber optic cable?
Correct answer: C. Light pulses
- A. Radio waves
- B. Electrical current
- C. Light pulses
- D. Microwaves
Explanation
Fiber optic cables use light pulses to transmit data. These light pulses travel along thin strands of glass or plastic fibers by reflecting off the inner surface of the fiber. Data is encoded onto the light pulses using techniques like binary encoding, where a pulse of light might represent a 1 and the absence of a pulse might represent a 0.Fiber optic cables offer several advantages over traditional copper cables for data transmission:Higher bandwidth: Fiber optic cables can transmit much larger amounts of data compared to copper cables.Lower signal loss: Light pulses experience less signal attenuation (weakening) over long distances compared to electrical signals in copper cables.Immunity to interference: Fiber optic cables are less susceptible to electromagnetic interference (EMI) which can corrupt data signals in copper cables.These advantages make fiber optic cables a preferred choice for high-speed data transmission applications such as the internet backbone, long-distance communication lines, and data centers.
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