In the structure of fiber, the light is guided through the core due to total internal:

  • A. Reflection
  • B. Refraction
  • C. Diffraction
  • D. None of these

Explanation

Optical fibre guides light by total internal reflection at the boundary between its denser core and less-dense cladding. Refraction changes direction at a boundary, but it is not the guiding principle named here.

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