Optical Fiber Principle
Easyphysics
Optical fibers work mainly on?
Select the correct option:
Solution
Incorrect! Answer:
Total internal reflection
- Fiber Structure: Consists of a central core made of high-quality glass or plastic, surrounded by a cladding layer with a lower refractive index (ncore>ncladding).
- Mechanism: Light signals are launched into the core at an angle greater than the critical angle.
- Propagation: The light undergoes repeated Total Internal Reflection (TIR) at the core-cladding boundary, essentially 'bouncing' along the length of the fiber.
- Advantage: This allows for extremely low-loss transmission of data over very long distances.
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About This Question
- Subject
- physics
- Chapter
- optics
- Topic
- optical fiber principle
- Difficulty
- Easy
- Year
- 2025
Solution
Correct Answer:
Total internal reflection
- Fiber Structure: Consists of a central core made of high-quality glass or plastic, surrounded by a cladding layer with a lower refractive index (ncore>ncladding).
- Mechanism: Light signals are launched into the core at an angle greater than the critical angle.
- Propagation: The light undergoes repeated Total Internal Reflection (TIR) at the core-cladding boundary, essentially 'bouncing' along the length of the fiber.
- Advantage: This allows for extremely low-loss transmission of data over very long distances.
This easy difficulty physics question is from the chapter optics, covering the topic of optical fiber principle. It appeared in the 2025 exam.
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