Exam-style question
Try this first
Explain the principle of total internal reflection as it applies to optical fibres in endoscopes.
Model answer
What a good answer should say
- Total internal reflection occurs when light traveling through a denser medium (the glass of the fibre) hits a less dense medium (air) at an angle greater than the critical angle, causing the light to be reflected back into the denser medium.
- This principle allows endoscopes to transmit light and images effectively.
Explanation
Why this works
This answer clearly articulates the principle of total internal reflection, which is fundamental to the operation of optical fibres in endoscopes. It tests the student's ability to explain a key physical concept and its application in medical technology.
Common mistake
No common mistake is linked to this question yet.