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Ray Optics and Optical Instruments
Total Internal Reflection: Optical Fibres
1 question from 1 paper, each with its answer.
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Concepts tested
- Principle of optical fibre
All Questions
2001 AIPMT 1 question
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Optical fibres are based on : -An optical fibre has a glass core of higher refractive index surrounded by a cladding of lower refractive index.
Light entering the core strikes the core–cladding boundary at an angle greater than the critical angle, so it undergoes total internal reflection again and again and travels along the fibre with very little loss, even when the fibre bends.
So optical fibres are based on total internal reflection.