Question 7
(a) State the scientific principle underlying the operation of fibre optics.
(b) Explain each of the following terms as used in fibre optics:
(i) core;
(ii) cladding.
Observation
Many candidates wereunable to answer the question correctly. Performance was fair
The expected answer is
(a) Scientific Principle
Total Internal Reflection
(b) Explanation of Terms
(i) Core: The central/inner part of the optical fibre( that acts as the light carrying portion of the fibre)
(ii) Cladding: The outer layer that surrounds the core (with lower refractive index)