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How is the Refractive Index of a Material Related to the Speed of Light in It?

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Question

How is the refractive index of a material related to the speed of light in it? 

Short Answer
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Solution

The refractive index is the ratio of speeds of light in the two mediums.
The refractive index of medium 2 with respect to medium 1 is equal to the ratio of speeds of light in medium 1 and in medium 2.
`1^2n=v_1/v_2` 

`v_1` = Speed of light in medium 1 

`v_2` = Speed of light in medium 2 

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Chapter 2: Refraction of Light - Exercise 2 [Page 92]

APPEARS IN

Lakhmir Singh Physics Part 1 [English] Class 10
Chapter 2 Refraction of Light
Exercise 2 | Q 8. | Page 92
Lakhmir Singh Physics [English] Class 10 ICSE
Chapter 4 Refraction of Light at Plane Surfaces
Intex Question | Q 6. | Page 84
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