Exam-style question
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In the context of optical fibres, what does the term 'numerical aperture' refer to?.
- A.The maximum angle at which light can enter the fibre
- B.The amount of light transmitted through the fibre
- C.The ratio of the core diameter to the cladding diameter
- D.The wavelength of light used in transmission
Model answer
What a good answer should say
- The maximum angle at which light can enter the fibre
Explanation
Why this works
The numerical aperture of an optical fibre defines the maximum angle at which light can enter the fibre and still be guided through it, which is crucial for efficient light transmission.
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