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Refractive Index of a Prism

Which of the ...

Question

Which of the following phenomenon is used in optical fibre?

A

Reflection

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B

Refraction

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C

Dispersion

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D

Total Internal Reflection

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Solution

The correct option is D
Total Internal Reflection

In an optical fibre, total internal reflection occurs from a prism where the entire incident light (100%) is reflected back into the denser medium, whereas, in ordinary reflection from a plane mirror, some light is refracted or absorbed so the reflection is partial.

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Similar questions

Q. Question 5
Which of the following phenomena of light are involved in the formation of a rainbow?

(a) Reflection, refraction and dispersion
(b) Refraction, dispersion and total internal reflection
(c) Refraction, dispersion and internal reflection
(d) Dispersion, scattering and total internal reflection

Q. Assertion : Optical fibres are used for telecommunication.
Reason : Optical fibres are based on the phenomenon of total internal reflection.

Q. In which one of the following the phenomenon of total internal reflection of light is used ?

Q. (a) Write the necessary conditions for the phenomenon of total internal reflection to occur.
(b) Write the relation between the refractive index and critical angle for a given pair of optical media.

Q. Assertion :Optical fibres make use of total internal reflection. Reason: Light undergoes successive total internal reflections as it moves through an optical fibre.

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