Optical fiber operates on the principle of total internal reflection. This phenomenon occurs when light travels from a denser medium (the fiber's core) to a rarer medium (the cladding) at an angle of incidence greater than the critical angle, causing all the light to be reflected back into the core, allowing it to travel long distances with minimal loss of energy.
Optical fiber operates on the principle of ______?
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This question is part of 📡 Electronics and Communication Engineering (ECE) within the broader 🛠️ Engineering Essentials subject and appears in the SPSC – Sindh Public Service Commission preparation collection. Reviewing the answer together with nearby questions helps reinforce the underlying concept and identify how it may appear in competitive exams.