PHYSICAL LAYER AND TRANSMISSION MEDIA
INTRODUCTION
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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In fiber optics, the signal source is ____ waves.
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light
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LED
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radio
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infrared
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Explanation:
Detailed explanation-1: -In fibre optics, the signal source is Light waves. The light in a fibre-optic cable flows through the core (hallway) by continually bouncing off the cladding (mirror-lined walls), a concept known as complete internal reflection.
Detailed explanation-2: -The three main wavelengths used for fiber optic transmission are 850, 1300, and 1550 nanometers. These wavelengths are used in fiber optics because they have the lowest attenuation of the fiber. The length of a wave has a direct relationship with its attenuation rate − the longer the wave, the less attenuation.
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