H31-311: HCIA-Transmission V2.5Demo

By Huawei · Question Mode

QuestionQ18

AI Overview

Which of the following principles is used for light propagation in an optical fiber? According to Snell’s law, the angles of incidence and reflection are equal (θ1 = θ3), and the relationship between incidence and refraction satisfies the equation: n1sinθ1 = n2sinθ2.

  • A Total reflection
  • B Scattering
  • C Incidence
  • D Refraction
Explanation

Optical fibers confine and transmit light through total internal reflection at the boundary between the higher-refractive-index core and the lower-refractive-index cladding. Snell’s law determines the critical-angle condition for this reflection.

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