BRAINCAKEModal (Multipath) Dispersion
Total internal reflection occurs at the core-cladding boundary. The cladding makes sure that light does not cross from one fibre to another and the light signal is secure within each fibre.
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Key terms in this lesson
- Total internal reflection
- The complete reflection of a light ray at a boundary, occurring when the ray travels in the denser medium and the angle of incidence exceeds the critical angle.
- Dispersion
- The splitting of white light into its constituent colours because different wavelengths are refracted by different amounts.