Optical fibers guides:
Correct answer: B. Light
- A. Current
- B. Light
- C. Sound
- D. Voltage
Explanation
Optical fibers are designed to guide light, which is used for transmitting data over long distances with minimal loss. The core of an optical fiber is made of glass or plastic, allowing light to bounce along its length in a process called total internal reflection. This makes them ideal for high-speed data transmission. Options such as current, sound, and voltage are incorrect because optical fibers do not guide electrical currents, sound waves, or electrical voltages; they are specifically engineered for light transmission.
This question appeared on the ETEA MDCAT 2012 paper, which you can sit online with every answer explained.
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About Optics
Light is studied through reflection, refraction, dispersion, interference, diffraction and polarization, linking ray behavior with its wave nature. Questions may involve mirrors, lenses, optical instruments, refractive index and image formation, while geometrical optics deals with rays and wave optics explains effects such as interference and diffraction.
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