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If we compared to the core, the index of refraction of cladding must be ________

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If we compared to the core, the index of refraction of cladding must be ________

(a) same

(b) greater

(c) less

(d) infinite

I got this question in an online quiz.

My question is from Baseband Channel topic in portion Baseband Data Transmission of Analog Communications

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Best answer
Right answer is (c) less

To elaborate: Core of a optical fiber is a cylinder of glass or plastic that runs along the fiber’s length. The core is surrounded by a medium with a lower index of refraction, called cladding.

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