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What is total internal reflection?

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What is total internal reflection? 

Explain total internal reflection of light.

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Solution

Total internal reflection is the phenomenon when a ray of light travelling in a denser medium is incident at the surface of a rarer medium such that the angle of incidence is greater than the critical angle for the pair of media, and the ray is totally reflected back into the denser medium.

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Chapter 4: Refraction of Light at Plane Surfaces - EXERCISE - 4 (D) [Page 100]

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Selina Physics [English] Class 10 ICSE
Chapter 4 Refraction of Light at Plane Surfaces
EXERCISE - 4 (D) | Q 9. (a) | Page 100
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