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| Q. |
Optical fibres are based on the phenomenon of – |
| A. | Interference |
| B. | Dispersion |
| C. | Diffraction |
| D. | Total Internal Reflection |
| Answer» D. Total Internal Reflection | |
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Explanation: An optical fiber (or optical fibre) is a flexible, transparent fiber made of glass (Silica) or plastic, slightly thicker than a human hair. It functions as a waveguide, or "light pipe", to transmit light between the two ends of the fiber. Optical fibers typically include a transparent core surrounded by a transparent cladding material with a lower index of refraction. Light is kept in the core by total internal reflection. This causes the fiber to act as a waveguide. |
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