# Optical Fiber Waveguides – 4

4. The core of the optical fiber has ……… ?

(a) A medium index of refraction
(b) A lower index of refraction than the cladding
(c) A lower index of refraction than air
(d) A higher index of refraction than the cladding

Explanation
Explanation : No answer description available for this question. Let us discuss.
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