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Who proposed the idea of transmission of light via dielectric waveguide structure?Who proposed the idea of transmission of light via dielectric waveguide structure?
The answer is:
C. hondros and debye
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Who proposed the use of clad waveguide structure?Who proposed the use of clad waveguide structure?
The answer is:
C. kao and hockham
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Which law gives the relationship between refractive index of the dielectric?Which law gives the relationship between refractive index of the dielectric?
The answer is:
B. law of refraction (snell’s law).
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The light sources used in fibre optics communication are :The light sources used in fibre optics communication are :
The answer is:
A. led’s and lasers
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The ________ ray passes through the axis of the fiber coreThe ________ ray passes through the axis of the fiber core.
The answer is:
C. meridional
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Light incident on fibers of angles________the acceptance angle do not propagate into the fiberLight incident on fibers of angles________the acceptance angle do not propagate into the fiber
The answer is:
B. greater than
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What is the numerical aperture of the fiber if the angle of acceptance is 16 degreeWhat is the numerical aperture of the fiber if the angle of acceptance is 16 degree
The answer is:
D. 0.27
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The ratio of speed of light in air to the speed of light in another medium is called as_________The ratio of speed of light in air to the speed of light in another medium is called as_________
The answer is:
D. refraction index
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When a ray of light enters one medium from another medium, which quality will not changeWhen a ray of light enters one medium from another medium, which quality will not change
The answer is:
B. frequency
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An optical fiber has core-index of 1.480 and a cladding index of 1.478. What should be the core size for single mode operation at 1310nm?An optical fiber has core-index of 1.480 and a cladding index of 1.478. What should be the core size for single mode operation at 1310nm?
The answer is:
D. 6.50μm
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An optical fiber has a core radius 2μmand a numerical aperture of 0.1. Will this fiber operate at single mode at 600 nm?An optical fiber has a core radius 2μmand a numerical aperture of 0.1. Will this fiber operate at single mode at 600 nm?
The answer is:
A. yes
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What is needed to predict the performance characteristicsics of single mode fibers?What is needed to predict the performance characteristicsics of single mode fibers?
The answer is:
B. geometric distribution of light in a propagating mode
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Which equation is used to calculate MFD?Which equation is used to calculate MFD?
The answer is:
B. peterman equations
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A single mode fiber has mode field diameter 10.2μmand V=2.20. What is the core diameter of this fiber?A single mode fiber has mode field diameter 10.2μmand V=2.20. What is the core diameter of this fiber?
The answer is:
D. 10.1μm
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The difference between the modes’ refractive indices is called asThe difference between the modes’ refractive indices is called as
The answer is:
C. fiber birefringence
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A single mode fiber has a beat length of 4cm at 1200nm. What is birefringence?A single mode fiber has a beat length of 4cm at 1200nm. What is birefringence?
The answer is:
C. 3*10-5
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How many propagation modes are present in single mode fibers?How many propagation modes are present in single mode fibers?
The answer is:
B. two
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Numerical aperture is constant in case of step index fiber. State whether the statement is true or falseNumerical aperture is constant in case of step index fiber. State whether the statement is true or false.
The answer is:
A. true
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Plastic fibers are less widely used than glass fibers. State whether the statement is true or falsePlastic fibers are less widely used than glass fibers. State whether the statement is true or false.
The answer is:
A. true
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Which equations are best suited for the study of electromagnetic wave propagation?Which equations are best suited for the study of electromagnetic wave propagation?
The answer is:
A. maxwell’s equations
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