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ISRO2016-ECE Networks

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A typical optical fiber has

  1. high refractive index core & low refractive index cladding
  2. Low refractive index core & high refractive index cladding
  3. Uniform refractive index core surrounded by variable refractive index cladding
  4. None of the above
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A typical optical fiber has Low refractive index core & high refractive index cladding
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Answer is option (a). 

The core has higher refractive index than cladding in optic fiber. 

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