In optical fibres, propagation of light is due to
(a) diffraction (b) total internal reflection
(c) reflection (d) refraction
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Answer:
It is due to total internal reflection
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Answer:
(b) total internal reflection
Explanation:
Light traveling in an optically dense medium hits a boundary at a steep angle, the light is completely reflected.
This is called total internal reflection.
This effect is used in optical fibers to confine light in the core.
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