Deck 19: Fiber Optics

Question 1

is a measure of the range of colors that are emitted by the light source.

A) Wavelength
B) Spectral width
C) Emission variability
D) Receiving density

Answer 1

B

Question 2

With fiber optic systems, losses due to poor connection can be substantial. Losses are measured in .

A) meters
B) dollars
C) watts
D) decibels

Answer 2

D

Question 3

Coaxial cable can carry about mbps of data.

A) 0.1
B) 1.0
C) 10
D) 100

Answer 3

C

Question 4

Briefly describe two conditions that generally account for poor connections in fiber optic systems.

Question 5

The is the speed at which light can travel through a material.

A) optical property
B) diffractive index
C) internal reflection
D) vacuum ratio

Question 6

There are three basic types of fiber optic connectors: the , the bayonet, and the push-pull.

A) LED
B) threaded
C) coaxial
D) photodiode

Question 7

Fiber optic lighting systems are composed of three primary sections: the , the cable, and the end fixtures.

A) crimp
B) illuminator
C) diode
D) battery

Question 8

In glass optical fibers, the index of refraction is approximately 1.46 to .

A) 1.48
B) 1.50
C) 1.51
D) 1.53

Question 9

The type connector has become very popular for connecting fiber optic cables because it offers excellent alignment and has less back reflection than other types of connectors.

A) photodiode
B) threaded
C) push-pull
D) bayonet

Question 10

Fiber optic cables are composed of three sections: the core, the , and the sheath.

A) jacket
B) cladding
C) skin
D) center

Question 11

The core of a fiber optic cable is composed of either or plastic.

A) polyurethane
B) copper
C) silver
D) glass

Question 12

What is the numerical aperture of a light source?

Question 13

Fiber optic cable is electromagnetic interference.

A) totally immune to
B) highly susceptible to
C) less immune than copper wire to
D) unable to deal with

Question 14

Discuss modal dispersion as it relates to single-mode and multimode cables.

Question 15

What are the advantages of fiber optic lighting over conventional lighting?

Question 16

What is the oldest type of connector, and what are its limitations?

Question 17

The reason that light can travel through an optical fiber is because of .

A) linearity
B) diffraction
C) refraction
D) reflection

Question 18

are preferred over other types of photo detection devices because of their speed of operation.

A) Photodiodes
B) LEDs
C) Transmitters
D) Prisms

Question 19

is generally used to examine the fiber optic connection for possible problems.

A) A magnifying glass
B) A telescope
C) The naked eye
D) A microscope

Question 20

A type of multimode cable called cable has a core made of concentric rings.

A) bandwidth
B) coaxial
C) graded
D) singular