Optical Fibres
2 marks · NormalState two different applications of optical fibres, other than medical endoscopes, and briefly describe how they work.
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Must show: two named uses; brief description of each
Also accept: Telecommunications—light pulses carry signals; data transmission—Internet/cable; sensors, e.g. in industry; security cameras.
Common mistakes: Repeating medical uses; not describing how fibre is used.
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Marking points
B1 · 1 mark · Names first correct application and describes how optical fibres are used in it.
B1 · 1 mark · Names second correct application and describes how optical fibres are used in it.
Worked solution
One application is telecommunications, where optical fibres carry data as pulses of light between locations. Another use is in security systems, where optical fibres detect changes in light or vibration to monitor for intrusions.