Multiple choice

Optical fibres typically include a transparent core surrounded by a transparent cladding material. Light is kept inside the core by

  1. reflection

  2. interference

  3. total internal reflection

  4. diffraction

Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

Optical fibres typically include a transparent core surrounded by a transparent cladding material with a lower index of refraction. Light is kept in the core by total internal reflection. This causes the fibre to act as a waveguide.

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