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MPSC State Service 2019 · GS · Question 4 of 97

Optical fibre is based on which of the following principles? a. Principle of reflection of light b. Principle of refraction of light c. Principle of total internal reflection d. Principle of dispersion of light

Physics

  1. Aa, b and c
  2. BOnly cCorrect
  3. Cb and d
  4. DOnly d

Answer: B. Only c

Explanation

Optical fibre guides light by total internal reflection — only statement c.

Source: MPSC Rajyaseva Prelims 2019 – GS Paper I (Set A), official paper

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