Exam-style question
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What is the principle behind how endoscopes use fibre optics?.
- A.They rely on total internal reflection to transmit light.
- B.They use diffraction to create images.
- C.They depend on refraction to bend light around corners.
- D.They utilize absorption to enhance image quality.
Model answer
What a good answer should say
- They rely on total internal reflection to transmit light.
Explanation
Why this works
Endoscopes use fibre optics based on the principle of total internal reflection, which allows light to be transmitted through the fibres without significant loss, enabling clear imaging inside the body.
Common mistake
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