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WorksheetsOPTICAL FIBERS AND THEIR PROPERTIES
Total questions: 20
Worksheet time: 20mins
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
Which part is not included in the fiber-optic communication system?
Transmitter
Transmission channel
Transformer
Receiver
Statement above refer the formula of index of refraction. Choose the CORRECT value of velocity of light in vacuum, c.
Define - Acceptance Angle
maximum angle that a light ray can have relative to the axis of the fiber and propagate down the fiber.
minimum angle that a light ray can have relative to the axis of the fiber and propagate down the fiber.
Right angle that a light ray can have relative to the axis of the fiber and propagate down the fiber.
None of the above
Why is laser much preferred than LED as an optical source?
more directional
High coherent
Faster rise time
All the above
Define − Numerical aperture
is defined as the Cos of the acceptance angle
is defined as the sine of the acceptance angle
is defined as the reverse of the acceptance angle
is defined as the inverse of the acceptance angle
Fiber optics provide data security.
True
False
