Is a machine that makes powerful single color light
fiber optic signals
electromagnetic signal (radio waves)
laser
fiber optic cable
Q.2.
Which is the Snell's law ?
y = ab + c
n1 = n2 sin ϴ2
n1 sin ϴ1 = n2 sin ϴ2
sin ϴ1 = sin ϴ2
Q.3.
From the innermost portion moving outward, the order of fiber-optic cable elements are _____.
glass or plastic core, cladding, buff er, sheath
glass or plastic core, sheath, buff er, cladding
glass or plastic core, buff er, cladding, sheath
glass or plastic core, buffer, sheath, cladding
Q.4.
Major causes of attenuation in fiber-optic cable can be characterized as scattering, dispersion, extrinsic losses, and _____.
Crosstalk
Interference
Fresnel reflection loss
Magnetic Induction
Q.5.
What is the difference between scattering and dispersion?
Scattering is the loss of signal strength due to impurities in the core material; dispersion is the distortion of a light wave pattern as it reflects off the core cladding.
Scattering is due to the refraction property diff erences in the core material; dispersion occurs when intervening material absorbs some of the signal.
Scattering is loss of signal strength due to physical factors outside the core; dispersion is the loss of signal strength due to impurities in the core material.
Scattering occurs due to an improper termination; dispersion occurs due to a poorly spliced cable.
Q.6.
Is when light bounces off of the inside of a glass or plastic cable or fiber.
total internal reflection
electromagnetic signal (radio waves)
laser
fiber optic cable
Q.7.
Information and data that are sent over glass or plastic cables using light
fiber optic signals
electromagnetic signal
laser
fiber optic cable
Q.8.
Signals that travel through the air without wires.
fiber optic signals
electromagnetic signal
laser
fiber optic cable
Q.9.
Is the glass or plastic cable light is sent through in fiber optics.
fiber optic signals
electromagnetic signal (radio waves)
laser
fiber optic cable
Q.10.
The signals sent in fiber optics are numbers coded into a signal that looks like a series of steps.
total internal reflection
digital
laser
fiber optic cable
Q.11.
A(n) _____ wave is a form of energy that behaves like a wave and can travel through a vacuum.
radio
sound
surface
electromagnetic
Q.12.
Which of the following is not a benefit of fiber-optic cable over copper-core cable?
Increased security
Less cost
Higher Bandwidth
Immune to electromagnetic interference
Q.13.
Fiber-optic cable uses _____ instead of electrical energy to transmit data.
Radio Waves
Microwaves
Light Pulses
Satellite Transmissions
Q.14.
A(n) _____ is a device for testing and troubleshooting long runs of fiber-optic cable.
tone generator
optical time domain reflectometer
digital multimeter
punch down tool
Q.15.
Classifications of fiber-optic cable based on the design of the cable core are _____ and _____.
graded-index, step-index
step-index, single-mode
single-mode, graded-index
multimode, single-mode
Q.16.
Th e broad classifications of fiber-optic cable based on the diameter of the core are _____ and _____.
graded-index, step-index
step-index, multimode
multimode, single-mode
graded-index, multimode
Q.17.
Information and data that are sent over copper or metal wires using electricity
encode
transmit
decode
electrical signal
Q.18.
To read or interpret information. When you read a book
encode
transmit
decode
electrical signal
Q.19.
To send a message. When you hit send or post for a text message.
encode
transmit
decode
electrical signal
Q.20.
To create a message in a code. Typing or writing a message is an example.
encode
transmit
decode
electrical signal
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