Certified Fiber Optics Practice Exam

Fiber optic cables are immune to which of the following?

1. Voltage

2. Radiation

3. Heat

4. Noise

The correct answer is: Radiation

Fiber optic cables are indeed immune to radiation, which is a significant advantage in various applications. This immunity stems from the nature of fiber optics, which transmit data using light instead of electrical signals. Since radiation primarily affects electrical conductors by inducing currents that can disrupt signals, fiber optics remain unaffected because they do not carry a traditional electrical current. In environments where radiation exposure is a concern—such as nuclear facilities, space applications, or certain industrial settings—using fiber optic cables ensures that data transmission remains reliable and secure despite the presence of harmful radiation. This characteristic is critical for maintaining the integrity of communications in such sensitive environments. While fiber optics do exhibit some sensitivity to heat, voltage, and electromagnetic noise, their light-based transmission method insulates them against the kinds of disruptions that often affect metal wires and electronic systems. Thus, their immunity to radiation is what makes them particularly suitable for demanding conditions.