Exam-style question
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What is the role of cladding in optical fibres?.
- A.To increase the speed of light
- B.To provide structural support
- C.To maintain total internal reflection
- D.To absorb excess light
Model answer
What a good answer should say
- To maintain total internal reflection
Explanation
Why this works
Cladding in optical fibres has a lower refractive index than the core, which helps to maintain total internal reflection, ensuring that light remains within the core and is transmitted effectively.
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