SECTION C: ( 20 MARKS )
Instruction: : Answer any one question from this section.
Type material Refractive index Purity Characteristics Fiber diameter
A 2.5 Pure Rigid, strong Small
B 1.95 pure Not rigid, strong Small
C 1.5 Pure Rigid, not strong Big
D 1.95 Some impurity Not rigid, not strong Big
The table above shows the characteristic for 4 types of materials chosen to make fiber optics.
i) what is mean by total internal reflection ( 1 marks )
ii) State the conditions for total internal reflection to occur. ( 2 marks)
b ) Explain the suitability of the material in the table above to be used in the making of fiber
optics. Choose the most suitable material and give the reasons for your choice ( 10 marks)
c ) The refractive index of glass is 1.5 and diamond 2.4.
i) Determine the critical angle for glass and diamond. ( 2 marks)
QUESTION END
Instruction: : Answer any one question from this section.
Type material Refractive index Purity Characteristics Fiber diameter
A 2.5 Pure Rigid, strong Small
B 1.95 pure Not rigid, strong Small
C 1.5 Pure Rigid, not strong Big
D 1.95 Some impurity Not rigid, not strong Big
The table above shows the characteristic for 4 types of materials chosen to make fiber optics.
i) what is mean by total internal reflection ( 1 marks )
ii) State the conditions for total internal reflection to occur. ( 2 marks)
b ) Explain the suitability of the material in the table above to be used in the making of fiber
optics. Choose the most suitable material and give the reasons for your choice ( 10 marks)
c ) The refractive index of glass is 1.5 and diamond 2.4.
i) Determine the critical angle for glass and diamond. ( 2 marks)
QUESTION END
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