Physics (Essay) Paper 2 WASSCE (SC), 2020

Question 3

 

 

(a) In the design of an optical finre, what type of material is most suitable for the design     of the core?
(b) State one condition necessary to confine signals to the core of an optical fibre.

Observation

 

 

This is another favorites question among candidates. Most of the candidates got the correct answer.

The expected answer is:
(a)        Type of material most suitable for the design of the core of an optical fibre
Glass/plastics  


(b)        Condition necessary to confine signal to the core of an optical fibre
The refractive index of the core must be greater than that of the cladding