Working of an optical fibre is based on the principle of total internal reflection of light. When a signal in the form of light is directed at one end of the fibre at a suitable angle, it undergoes repeated total internal reflections along the length of the fibre and finally comes out at the otherend.
Class 12 Physics Chapter 9 Ray Optics and Optical Instruments Session 2024-2025.
State the principle on which the working of an optical fibre is based.
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The working of an optical fiber is based on the principle of total internal reflection. When light enters the fiber at a certain angle, it is continuously reflected inside the core due to the difference in refractive indices between the core and the cladding. This allows light to travel long distances with minimal loss, even around bends.
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