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WorksheetsFibre Optics
Total questions: 10
Worksheet time: 15mins
Optical fibre based on the principle of
total internal reflection.
total internal refraction.
diffraction.
interference.
The core of the optical fibre is
opaque and conducting material.
opaque and dielectric material.
transparent and conducting material.
transparent and dielectric material.
A measurement of the ability of an optical fibre to capture light is called
acceptance angle.
cladding.
numerical aperature.
critical angle.
The unit of Numerical aperature is
meter
degree
Coulomb per meter
no unit.
Which of the following statement is correct?
Refractive index of core and cladding are equal.
Refractive index of core is more then that of cladding.
Refractive index of core is less then that of cladding.
Refractive index of core is less or equal to that of cladding.
If the numerical aperature of an optical fibre is 0.515, then the maximum angle of incidence is __________ degree.
0.008
17.5
31
67
The refractive index of core and cladding for a step index fibre are 1.42 and 1.29 respectively. The numerical aperature of the fibre is
0.3523
0.59
0.13
2.71
Which of the following is ( are) correct?
The refractive index of the core of the step index fiber is constant throughout the core.
The refractive index of the graded index fibre is maximum at the centre of the core and then it decreases towards core-cladding interface.
The bandwidth in fibre optical communication is very high as against in case of coaxial cable transmission.
All the above
Which part is not included in the fiber-optic communication system?
Transmitter
Transmission channel
Transformer
Receiver
The function of cladding is
to produce refraction of rays.
to produce total internal reflections of rays.
to produce transmission of Ray's.
to provide a firm support to the core glass.
