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1 An active fiber detector: (a) is used to prevent accidental exposure to invisible light (b) is a communication system used during installation (c) detects movement of fiber in security systems (d) can be used to weigh objects

1 An active fiber detector: (a) is used to prevent accidental exposure to invisible light (b) is a communication system used during installation (c) detects movement of fiber in security systems (d) can be used to weigh objects

Computer Networking: A Top-Down Approach (7th Edition)
Computer Networking: A Top-Down Approach (7th Edition)
7th Edition
ISBN:9780133594140
Author:James Kurose, Keith Ross
Publisher:James Kurose, Keith Ross
Chapter1: Computer Networks And The Internet
Section: Chapter Questions
Problem R1RQ: What is the difference between a host and an end system? List several different types of end...
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1 An active fiber detector: (a) is used to prevent accidental exposure to invisible light (b) is a communication system used during installation (c) detects movement of fiber in security systems (d) can be used to weigh objects If light leaves a material of refractive index 1.45 and crosses an abrupt boundary into a material of refractive index 1.0, the Fresnel loss would be: (a) 0.346 dB (b) 0.149 dB (c) 1.613 dB (d) 3 dB Absorption loss is caused by: (a) insufficient stirring of the ingredients during manufacture (b) changes in the density of the fiber due to uneven rates of cooling 3 (c) microscopic cracks in the cladding which allow leakage of the vacuum in the core (d) impurities in the fiber Rayleigh scatter is most severe: (a) in light with a short wavelength (b) in blue light on the Earth and black light on the moon (c) in low frequency light (d) at sunset Bending losses: (a) always result in breakage of the fiber (b) can be caused by microbends and macrobends (c) are used to detect the length of fiber on a drum (d) are caused by the difference in the operating temperature of the core compared with the cladding on active fibers
Transcribed Image Text:1 An active fiber detector: (a) is used to prevent accidental exposure to invisible light (b) is a communication system used during installation (c) detects movement of fiber in security systems (d) can be used to weigh objects If light leaves a material of refractive index 1.45 and crosses an abrupt boundary into a material of refractive index 1.0, the Fresnel loss would be: (a) 0.346 dB (b) 0.149 dB (c) 1.613 dB (d) 3 dB Absorption loss is caused by: (a) insufficient stirring of the ingredients during manufacture (b) changes in the density of the fiber due to uneven rates of cooling 3 (c) microscopic cracks in the cladding which allow leakage of the vacuum in the core (d) impurities in the fiber Rayleigh scatter is most severe: (a) in light with a short wavelength (b) in blue light on the Earth and black light on the moon (c) in low frequency light (d) at sunset Bending losses: (a) always result in breakage of the fiber (b) can be caused by microbends and macrobends (c) are used to detect the length of fiber on a drum (d) are caused by the difference in the operating temperature of the core compared with the cladding on active fibers
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