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WorksheetsOFC MODULE 1
Total questions: 15
Worksheet time: 7mins
Which among the following is described by the concept of numerical aperture in an optical fibre?
Light collection
Light scattering
Light dispersion
Light polarisation
A ray of light will undergo total internal reflection if it
Goes from rarer medium to denser medium
Incident at an angle less than the critical angle
strikes the interface normally
Incident at an angle greater than the critical angle
Which of the following is not due to total internal reflection of light?
Brilliance of diamond
Mirage formation
Optical fibre working
Rainbow formation
The three major groups in the optical system are
the components, the data rate and response time
the source, the link, and the receiver
the transmitter, the cable, and the receiver
the source, the link, and the detectoR
The terms single mode and multimode are
the number of fibers placed into a fiber-optic cable
the number of voice channels each fiber can support
The number of wavelengths each fiber can support
the index number
The cladding which surrounds the fiber core
is used to reduce optical interference
is used to protect the fiber
acts to help guide the light in the core
ensures that the refractive index remains constant
The term critical angle describes
the point at which light is refracted
the point at which light becomes invisible
the point at which light has gone from the refractive mode to the reflective mode
the point at which light has crossed the boundary layers from one index to another
An incident ray can be defined as
a light ray reflected from a flat surface
a light ray directed toward a surface
a diffused light ray
a light ray that happens periodically
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
In single mode fibers, which is the most beneficial index profile?
Step index
Graded index
Step and graded index
Coaxial cable
In an optical fiber, the concept of Numerical aperture is applicable in describing the ability of __________
Light Collection
Light Scattering
Light Dispersion
Light Polarization
In spontaneous emission, the light source in an excited state undergoes the transition to a state with _______
Higher energy
Moderate energy
Lower energy
All of the above
Which among the following is a key process adopted for the laser beam formation as it undergoes the light amplification?
Spontaneous Emission
Stimulated Emission
Both a and b
None of the above
In the structure of fiber optic cable, the refractive index of core is always _______the refractive index of cladding.
Less than
Equal to
Greater than
None of the above
The loss in signal power as light travels down a fiber is called
Dispersion
Scattering
Absorption
Attenuation
