MCQ IN COMPUTER SCIENCE & ENGINEERING

COMPUTER SCIENCE AND ENGINEERING

COMPUTER NETWORKING

Question [CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
What type of signals are transmitted across fibre optic cables?
A
Electric
B
Light
C
Sound
D
Radio
Explanation: 

Detailed explanation-1: -Fiber-optic communication is a method of transmitting information from one place to another by sending pulses of infrared light through an optical fiber. The light is a form of carrier wave that is modulated to carry information.

Detailed explanation-2: -Fiber-optic cables transmit data via pulses of light. Optical fibers are very thin strands of glass or plastic less than 1/10 the thickness of a human hair.

Detailed explanation-3: -The transceiver is an important part of a fiber optics network and is used to convert electrical signals to optical (light) signals and optical signals to electrical signals.

Detailed explanation-4: -The light in a fiber-optic cable travels through the core (hallway) by constantly bouncing from the cladding (mirror-lined walls), a principle called total internal reflection. Because the cladding does not absorb any light from the core, the light wave can travel great distances.

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