IGNOU BCS 41 2026 - Explain the basic working principle of optical fiber communi

Question

Explain the basic working principle of optical fiber communication. How does light propagation differ in various types of optical fibers?

14 Feb 2026

Answer :

Word Count : 264

Optical fiber communication works on the principle of transmitting information in the form of light pulses through a thin strand of glass or plastic called an optical fiber. The fiber consists of a central core surrounded by a cladding layer with a lower refractive index. When light is launched into the core at a suitable angle, it undergoes total internal reflection at the core–cladding interface. This phenomenon confines the light within the core and allows it to travel long distances with minimal loss. The information to be

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