The loss in signal power as light travels down a fiber is called a. Dispersion b. Scattering c. Absorption d. Attenuation

The loss in signal power as light travels down a fiber is called
a. Dispersion
b. Scattering
c. Absorption
d. Attenuation
by

1 Answer

Answer :

d. Attenuation
by

Related questions

The loss in signal power as light travels down a fiber is called ∙ a. Dispersion ∙ b. Scattering ∙ c. Absorption ∙ d. Attenuation

Description : The loss in signal power as light travels down a fiber is called ∙ a. Dispersion ∙ b. Scattering ∙ c. Absorption ∙ d. Attenuation

Last Answer : ∙ d. Attenuation

ECE Board Exam November 1996 The loss in signal power as light travels down a fiber is A. attenuation B. propagation C. absorption D. scattering

Description : ECE Board Exam November 1996 The loss in signal power as light travels down a fiber is A. attenuation B. propagation C. absorption D. scattering

Last Answer : A. attenuation

The loss in signal power as light travels down the fiber is called a. attenuation b. progragation c. scattering d. interruption

Description : The loss in signal power as light travels down the fiber is called a. attenuation b. progragation c. scattering d. interruption

Last Answer : attenuation

The loss in signal power as light travels down the fiber is called ............. A) Attenuation B) Propagation C) Scattering D) Interruption

Description : The loss in signal power as light travels down the fiber is called ............. A) Attenuation B) Propagation C) Scattering D) Interruption

Last Answer : A) Attenuation

The loss in signal power as light travels down the fiber is called ............. A) Attenuation B) Propagation C) Scattering D) Interruption

Description : The loss in signal power as light travels down the fiber is called ............. A) Attenuation B) Propagation C) Scattering D) Interruption

Last Answer : A) Attenuation

The loss in signal power as light travels down the fiber is called ............. A) Attenuation B) Propagation C) Scattering D) Interruption

Description : The loss in signal power as light travels down the fiber is called ............. A) Attenuation B) Propagation C) Scattering D) Interruption

Last Answer : A) Attenuation

Loss due to the diffraction of light when it strikes on the irregularities formed during the manufacturing process of the fiber optics. A. Absorption loss B. Attenuation C. Bending loss D. Rayleigh scattering loss

Description : Loss due to the diffraction of light when it strikes on the irregularities formed during the manufacturing process of the fiber optics. A. Absorption loss B. Attenuation C. Bending loss D. Rayleigh scattering loss

Last Answer : D. Rayleigh scattering loss

The dominant loss mechanisms in silica fiber are ∙ a. Absorption and radiation losses ∙ b. Absorption and Rayleigh scattering ∙ c. Coupling and radiation losses ∙ d. Radiation and modal dispersion

Description : The dominant loss mechanisms in silica fiber are ∙ a. Absorption and radiation losses ∙ b. Absorption and Rayleigh scattering ∙ c. Coupling and radiation losses ∙ d. Radiation and modal dispersion

Last Answer : b. Absorption and Rayleigh scattering

Which of the following is not a factor in cable light loss? ∙ A. reflection ∙ B. absorption ∙ C. scattering ∙ D. dispersion

Description : Which of the following is not a factor in cable light loss? ∙ A. reflection ∙ B. absorption ∙ C. scattering ∙ D. dispersion

Last Answer : A. reflection

It is caused by the difference in the propagation time of light rays that take different paths down the fiber. ∙ A. modal dispersion ∙ B. microbending ∙ C. Rayleigh scattering ∙ D. chromatic dispersion

Description : It is caused by the difference in the propagation time of light rays that take different paths down the fiber. ∙ A. modal dispersion ∙ B. microbending ∙ C. Rayleigh scattering ∙ D. chromatic dispersion

Last Answer : A. modal dispersion

The upper pulse rate and information carrying capacity of a cable is limited by a. Pulse shortening b. Attenuation c. Light leakage d. Modal dispersion

Description : The upper pulse rate and information carrying capacity of a cable is limited by a. Pulse shortening b. Attenuation c. Light leakage d. Modal dispersion

Last Answer : d. Modal dispersion

The operation of the fiber-optic cable is based on the principle of a. Refraction b. Reflection c. Dispersion d. Absorption

Description : The operation of the fiber-optic cable is based on the principle of a. Refraction b. Reflection c. Dispersion d. Absorption

Last Answer : b. Reflection

________ dispersion is caused by the difference in the propagation times of light rays that take different paths down a fiber. a. Material dispersion b. Wavelength dispersion c. Modal dispersion d. Delay dispersion

Description : ________ dispersion is caused by the difference in the propagation times of light rays that take different paths down a fiber. a. Material dispersion b. Wavelength dispersion c. Modal dispersion d. Delay dispersion

Last Answer : c. Modal dispersion

What is the amount of sound reduction provided by a barrier – wall, floor, or ceiling called? A. Sound Attenuation B. Transmission loss C. Sound absorption D. Barrier loss

Description : What is the amount of sound reduction provided by a barrier – wall, floor, or ceiling called? A. Sound Attenuation B. Transmission loss C. Sound absorption D. Barrier loss

Last Answer : B. Transmission loss

An absorption loss caused by valence electrons in the silica material from which fibers are manufactured. A. Modal dispersion B. Infrared absorption C. Ion resonance absorption D. Ultraviolet absorption

Description : An absorption loss caused by valence electrons in the silica material from which fibers are manufactured. A. Modal dispersion B. Infrared absorption C. Ion resonance absorption D. Ultraviolet absorption

Last Answer : D. Ultraviolet absorption

Band loss is ∙ a. A reduction in transmitter power caused by earth’s surface curvature ∙ b. A reduction in strength of the signal caused by folded dipole bends ∙ c. An attenuation increase caused by bends radiating from the side of the fiber ∙ d. All of these

Description : Band loss is ∙ a. A reduction in transmitter power caused by earth’s surface curvature ∙ b. A reduction in strength of the signal caused by folded dipole bends ∙ c. An attenuation increase caused by bends radiating from the side of the fiber ∙ d. All of these

Last Answer : c. An attenuation increase caused by bends radiating from the side of the fiber

Light travels faster in a material with a lower refractive index. Therefore, light rays that travel a longer distance in a lower refractive index travel at a greater average velocity. What effect does this have on multimode graded-index fiber modal dispersion and bandwidth?

Description : Light travels faster in a material with a lower refractive index. Therefore, light rays that travel a longer distance in a lower refractive index travel at a greater average velocity. What effect does this have on multimode graded-index fiber modal dispersion and bandwidth?

Last Answer : Decreases the time difference between light rays, which reduces modal dispersion and increases fiber bandwidth.

Explain absorption loss and scattering loss occurs in optical fiber.

Description : Explain absorption loss and scattering loss occurs in optical fiber.

Last Answer : Scattering loss:- Basically, scattering losses are caused by the interaction of light with density fluctuations within a fiber. Density changes are produced when optical fibers are manufactured.  ... glass material. iii. Intrinsic absorption by the basic constituent atoms of the fiber material.

Results in reduction in the power of light wave as it travels down the cable. ∙ A. power loss ∙ B. absorption loss ∙ C. resistive loss ∙ D. heat loss

Description : Results in reduction in the power of light wave as it travels down the cable. ∙ A. power loss ∙ B. absorption loss ∙ C. resistive loss ∙ D. heat loss

Last Answer : A. power loss

What is a specific path the light takes in an optical fiber corresponding to a certain angle and number of reflection a. Mode b. Grade c. Numerical Aperture d. Dispersion

Description : What is a specific path the light takes in an optical fiber corresponding to a certain angle and number of reflection a. Mode b. Grade c. Numerical Aperture d. Dispersion

Last Answer : a. Mode

The following are the cause of light attenuation in fiber optics except ∙ a. Backscattering ∙ b. Absorption ∙ c. Refraction ∙ d. Microbends

Description : The following are the cause of light attenuation in fiber optics except ∙ a. Backscattering ∙ b. Absorption ∙ c. Refraction ∙ d. Microbends

Last Answer : c. Refraction

What is the term for the ratio of actual velocity at which a signal travels through a line to the speed of light in a vacuum? A. Velocity factor B. Characteristic impedance C. Surge impedance D. Standing wave ratio

Description : What is the term for the ratio of actual velocity at which a signal travels through a line to the speed of light in a vacuum? A. Velocity factor B. Characteristic impedance C. Surge impedance D. Standing wave ratio

Last Answer : A. Velocity factor

Why are visible-light LEDs not used for fiber optics? ∙ a. It has high losses ∙ b. It has short wave ∙ c. It has low attenuation ∙ d. It has weak signal

Description : Why are visible-light LEDs not used for fiber optics? ∙ a. It has high losses ∙ b. It has short wave ∙ c. It has low attenuation ∙ d. It has weak signal

Last Answer : ∙ a. It has high losses

The random and unpredictable electric signal from natural causes, both internal and external to the system is know as ________. A. Distortion B. Noise C. Attenuation D. Interference

Description : The random and unpredictable electric signal from natural causes, both internal and external to the system is know as ________. A. Distortion B. Noise C. Attenuation D. Interference

Last Answer : B. Noise

What type of fiber has the highest modal dispersion? a. Step-index multimode b. Graded index multimode c. Step-index single mode d. Graded index mode

Description : What type of fiber has the highest modal dispersion? a. Step-index multimode b. Graded index multimode c. Step-index single mode d. Graded index mode

Last Answer : a. Step-index multimode

Type of fiber that has the highest modal dispersion A. Step-index multimode B. Step-index single mode C. Graded index mode D. Graded index multimode

Description : Type of fiber that has the highest modal dispersion A. Step-index multimode B. Step-index single mode C. Graded index mode D. Graded index multimode

Last Answer : A. Step-index multimode

Scattering causes: a. loss b. dispersion c. inter symbol interference d. all of the above

Description : Scattering causes: a. loss b. dispersion c. inter symbol interference d. all of the above

Last Answer : a. loss

The upper pulse rate and information-carrying capacity of a cable is limited by ∙ A. pulse shortening ∙ B. attenuation ∙ C. light leakage ∙ D. modal dispersion

Description : The upper pulse rate and information-carrying capacity of a cable is limited by ∙ A. pulse shortening ∙ B. attenuation ∙ C. light leakage ∙ D. modal dispersion

Last Answer : D. modal dispersion

The upper pulse rate and information carrying capacity of a cable is limited by ∙ a. Pulse shortening ∙ b. Attenuation ∙ c. Light leakage ∙ d. Modal dispersion

Description : The upper pulse rate and information carrying capacity of a cable is limited by ∙ a. Pulse shortening ∙ b. Attenuation ∙ c. Light leakage ∙ d. Modal dispersion

Last Answer : ∙ d. Modal dispersion

Cable attenuation is usually expressed in terms of a. Loss per foot b. dB/km c. intensity per mile d. voltage drop per inch

Description : Cable attenuation is usually expressed in terms of a. Loss per foot b. dB/km c. intensity per mile d. voltage drop per inch

Last Answer : b. dB/km

The term power budgeting refers to ∙ A. the cost of cable, connectors, equipment and installation ∙ B. the loss of power due to defective components ∙ C. the total power available minus the attenuation losses ∙ D. the comparative costs of fiber and copper installations

Description : The term power budgeting refers to ∙ A. the cost of cable, connectors, equipment and installation ∙ B. the loss of power due to defective components ∙ C. the total power available minus the attenuation losses ∙ D. the comparative costs of fiber and copper installations

Last Answer : C. the total power available minus the attenuation losses

When connector losses, splice losses and coupler losses are added, what is the limiting factor? ∙ A. source power ∙ B. fiber attenuation ∙ C. connector and splice loss ∙ D. detector sensitivity

Description : When connector losses, splice losses and coupler losses are added, what is the limiting factor? ∙ A. source power ∙ B. fiber attenuation ∙ C. connector and splice loss ∙ D. detector sensitivity

Last Answer : D. detector sensitivity

A rainbow is formed by the ________ of light by water droplets. (a) dispersion (b) scattering (c) total internal reflection (d) dispersion and total interval reflection

Description : A rainbow is formed by the ________ of light by water droplets. (a) dispersion (b) scattering (c) total internal reflection (d) dispersion and total interval reflection

Last Answer : Ans:(d)

The sun remains visible for some time after it actually sets below the horizon. This happens due to 1. atmospheric refraction 2. scattering of light 3. dispersion Which of the above statements is/are correct? (a) 1 only (b) 1 and 2 (c) 1 and 3 (d) 1, 2 and 3

Description : The sun remains visible for some time after it actually sets below the horizon. This happens due to 1. atmospheric refraction 2. scattering of light 3. dispersion Which of the above statements is/are correct? (a) 1 only (b) 1 and 2 (c) 1 and 3 (d) 1, 2 and 3

Last Answer : Ans:(a)

The redness in atmosphere at Sunrise and Sunset is due to – (1) Refraction of light (2) Reflection of light (3) Dispersion of light (4) Scattering of light

Description : The redness in atmosphere at Sunrise and Sunset is due to – (1) Refraction of light (2) Reflection of light (3) Dispersion of light (4) Scattering of light

Last Answer : (4) Scattering of light Explanation: The red colour in the sky at sunset (and sunrise) is due to an effect called Rayleigh scattering. At sunrise or sunset, since the Sun is low on the horizon, ... through more of the atmosphere - and therefore bounce off more molecules -than at other times of day.

Twinkling of stars and non-twinkling of planets is accounted for by (a) scattering of light (b) dispersion of light (c) atmospheric refraction (d) none of these

Description : Twinkling of stars and non-twinkling of planets is accounted for by (a) scattering of light (b) dispersion of light (c) atmospheric refraction (d) none of these

Last Answer : (c) atmospheric refraction

Which of the following phenomena of light are involved in the formation of a rainbow? (a) Reflection, refraction and dispersion (b) Refraction, dispersion and total internal reflection (c) Refraction, dispersion and internal reflection (d) Dispersion, scattering and total internal reflection

Description : Which of the following phenomena of light are involved in the formation of a rainbow? (a) Reflection, refraction and dispersion (b) Refraction, dispersion and total internal reflection (c) Refraction, dispersion and internal reflection (d) Dispersion, scattering and total internal reflection

Last Answer : (b) Refraction, dispersion and total internal reflection

The term dispersion describes the process of ∙ A. separating light into its component frequencies ∙ B. reflecting light from a smooth surface ∙ C. the process by which light is absorbed by an uneven rough surface ∙ D. light scattering

Description : The term dispersion describes the process of ∙ A. separating light into its component frequencies ∙ B. reflecting light from a smooth surface ∙ C. the process by which light is absorbed by an uneven rough surface ∙ D. light scattering

Last Answer : A. separating light into its component frequencies

The redness in atmosphere at Sunrise and Sunset is due to : (1) Refraction of light (2) Reflection of light (3) Dispersion of light (4) Scattering of light

Description : The redness in atmosphere at Sunrise and Sunset is due to : (1) Refraction of light (2) Reflection of light (3) Dispersion of light (4) Scattering of light

Last Answer : Scattering of light

A radio signal travels ____ yards per microseconds. A. 273 B. 328 C. 618 D. 123.6

Description : A radio signal travels ____ yards per microseconds. A. 273 B. 328 C. 618 D. 123.6

Last Answer : C. 618

The operation of a fiber-optic cable is based on the principle of ∙ A. refraction ∙ B. reflection ∙ C. dispersion ∙ D. absorption

Description : The operation of a fiber-optic cable is based on the principle of ∙ A. refraction ∙ B. reflection ∙ C. dispersion ∙ D. absorption

Last Answer : A. refraction

The operation of the fiber-optic cable is based on the principle of ∙ a. Refraction ∙ b. Reflection ∙ c. Dispersion ∙ d. Absorption

Description : The operation of the fiber-optic cable is based on the principle of ∙ a. Refraction ∙ b. Reflection ∙ c. Dispersion ∙ d. Absorption

Last Answer : ∙ b. Reflection

If the length of the fiber point defect changes with pulse duration, is the OTDR signal deviation a point defect or a region of high fiber attenuation?

Description : If the length of the fiber point defect changes with pulse duration, is the OTDR signal deviation a point defect or a region of high fiber attenuation?

Last Answer : A point defect.

Light rays that are emitted simultaneously from an LED and propagated down an optical fiber do not arrive at the far end of the fiber at the same time results to ∙ A. intramodal dispersion ∙ B. pulse length dispersion ∙ C. modal dispersion ∙ D. wavelength dispersion

Description : Light rays that are emitted simultaneously from an LED and propagated down an optical fiber do not arrive at the far end of the fiber at the same time results to ∙ A. intramodal dispersion ∙ B. pulse length dispersion ∙ C. modal dispersion ∙ D. wavelength dispersion

Last Answer : D. wavelength dispersion

______ dispersion is caused by the difference in the propagation times of light rays that take different paths down a fiber. ∙ a. Material dispersion ∙ b. Wavelength dispersion ∙ c. Modal dispersion

Description : ______ dispersion is caused by the difference in the propagation times of light rays that take different paths down a fiber. ∙ a. Material dispersion ∙ b. Wavelength dispersion ∙ c. Modal dispersion

Last Answer : ∙ c. Modal dispersion

It is analogous to power dissipation to copper cables, impurities in the fiber absorb the light and covert it to heat. ∙ A. power loss ∙ B. absorption loss ∙ C. resistive loss ∙ D. heat loss

Description : It is analogous to power dissipation to copper cables, impurities in the fiber absorb the light and covert it to heat. ∙ A. power loss ∙ B. absorption loss ∙ C. resistive loss ∙ D. heat loss

Last Answer : B. absorption loss

It indicates what signal frequencies can be propagated through a given distance of fiber cable. ∙ A. Bandwidth Distance Product ∙ B. Pulse width dispersion ∙ C. Rise time ∙ D. Cutoff frequency

Description : It indicates what signal frequencies can be propagated through a given distance of fiber cable. ∙ A. Bandwidth Distance Product ∙ B. Pulse width dispersion ∙ C. Rise time ∙ D. Cutoff frequency

Last Answer : A. Bandwidth Distance Product

How do you reduce the loss that is produced when light strikes a flat polished end of a fiber optic? A. By painting the surface B. By inclining the surface C. By cooling D. By application of antireflection coating

Description : How do you reduce the loss that is produced when light strikes a flat polished end of a fiber optic? A. By painting the surface B. By inclining the surface C. By cooling D. By application of antireflection coating

Last Answer : D. By application of antireflection coating

A fiber-optic cable has a loss of 15 dB/km. The attenuation in a cable 1000 ft. long is ∙ A. 4.57 dB ∙ B. 9.3 dB ∙ C. 24 dB ∙ D. 49.2 dB

Description : A fiber-optic cable has a loss of 15 dB/km. The attenuation in a cable 1000 ft. long is ∙ A. 4.57 dB ∙ B. 9.3 dB ∙ C. 24 dB ∙ D. 49.2 dB

Last Answer : A. 4.57 dB