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Solution for What is Meant by the Refractive Index of a Substance? - CBSE Class 10 - Science

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Question

 What is meant by the refractive index of a substance?

Solution

If i is the angle of incidence and r is the angle of refraction, we get: 

`sin i/sin r` = constant 
This constant value is called the refractive index of the medium in which light enters through air. Refractive index of a medium can also be expressed in terms of speed of light as follows:

1n2 =`"speed of light in medium 1"/"speed of light  in medium 2"`
Here, 1n2 is the refractive index of medium 2 with respect to medium 1.  

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Solution What is Meant by the Refractive Index of a Substance? Concept: Refraction of Light - Refractive Index.
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