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WorksheetsFIBER OPTICS
Total questions: 15
Worksheet time: 9mins
A fiber-optic cable is composed of ………… concentric layers,
ONE
TWO
THREE
FOUR
The speed of light in plastic compared to the speed of light in air is
SLOWER
FASTER
THE SAME
Either lower or faster
Is a non-coherent light source for optical communications system. Or Which of the following is used as an optical transmitter on the Fiber Optical Communications?
ILD
LED
APD
PIN DIODE
Photodiodes used as fiber optic directors are
Unbiased to generate a voltage same as a solar cell
Reversed bias
Forward bias
Thermoelectrically cooled
Which of the following is not a common application of fiber-optic cable?
Computer networks
Long-distance telephone systems
Closed circuit TV
Consumer TV
which of the following is described by the concept of numerical aperture in an optical fibre?
Light scattering
light collection
light dispersion
Light polarisation
A dielectric waveguide for the propagation of electromagnetic energy at
light frequencies
(a)
One of the following is not a characteristic of light detectors.
Responsitivity
Spectral response
Transmit time
Dispersion
In single mode fibers, which is the most beneficial index profile?
Step index
Graded index
Step and graded index
Coaxial cable
Which type of fiber-optic cable is the best for very high speed data?
Single-mode step-index
Multimode step-index
Single-mode graded-index
Multimode graded-index
Multimode step index fiber has ___________
Large core diameter & large numerical aperture
Large core diameter and small numerical aperture
Small core diameter and large numerical aperture
Small core diameter & small numerical aperture
Which of the following is used as an optical receiver in fiber optics
communications
APD
Tunnel diode
Laser diode
LED
Acceptance angle is defined as the _______ angle of incidence at the endface of an optical fibre, for which the ray can be propagated in the optical fibre is.
maximum
minimum
none of the above
In which of the following optic fibre sensor the fibre is simply used to carry light to and from an external optical device where the sensing takes place?
INTRINSIC SENSORS
EXTRINSIC SENSORS
TEMPERATURE SENSORS
DISPLACEMENT SENSORS
(a) allow doctors to evaluate the interior surfaces of an organ by inserting a small tube into the body through a small cut.
