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Derive the relation n = Real depth/Apparent depth. - Physics (Theory)

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Question

Derive the relation n = `"Real depth"/"Apparent depth"`.

Derivation
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Solution

When an object in a denser medium (like water) is viewed from a rarer medium (like air), it appears raised due to refraction. The refractive index (n) is given by:

n = `"Real depth"/"Apparent depth"`

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Chapter 15: Refraction of Light at a Plane Interface : Total Internal Reflection : Optical Fibre - QUESTIONS [Page 781]

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Nootan Physics Part 1 and 2 [English] Class 12 ISC
Chapter 15 Refraction of Light at a Plane Interface : Total Internal Reflection : Optical Fibre
QUESTIONS | Q 1. iv. | Page 781
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