Physics · Total Internal Reflection and Optical Fibres
In a typical optical fibre used for communication, how do the refractive indices of the core and cladding compare?
Verified Solution4 OptionsUpdated: October 2026👁️1 View
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- 1Refractive index values do not matter as long as light is guided by mirrors.
- 2Core has a much lower refractive index than the cladding.
- 3Core has a slightly higher refractive index than the cladding.✓
- 4Core and cladding have exactly the same refractive index.
Correct answer
Core has a slightly higher refractive index than the cladding.
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