In optical fibers, the refractive index of the core is
Question and options
In optical fibers, the refractive index of the core is
- Greater than that of cladding
- Equal to that of cladding
- Smaller than that of cladding
- Independent of cladding
Answer and explanation
Correct answer: A - Greater than that of cladding
Light is guided by total internal reflection at the core-cladding boundary, which requires the core to have a higher refractive index than the cladding.
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