Errors in the transmission of power through optic fiber can be minimized by using a______________?
Correct answer: B. Graded index fiber
- A. Multimode index fiber
- B. Graded index fiber
- C. Single mode step index fiber
- D. Copper wire
Explanation
A graded-index fibre has a core whose refractive index gradually decreases from the centre outward, causing different modes to travel with more nearly equal transit times. This reduces modal dispersion and therefore minimizes pulse spreading and transmission errors. Students may choose c because single-mode fibre has very low dispersion, but the standard answer for reducing multimode modal dispersion is graded-index fibre.
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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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