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Q.

Is it true that the absolute refractive index is the ratio of the speed of light in a vacuum to the speed of light in a medium?


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a

True

b

False 

answer is A.

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Detailed Solution

The above statement is True.
The refractive index of a medium with respect to vacuum is considered to be its absolute refractive index. It is always greater than 1. It is also equal to the speed of light in a vacuum to the speed of light in the medium. The refractive index of a medium can be calculated using the following formula
n=cv
Where n is the refractive index
            c is the velocity of light in a vacuum
            v is the velocity of light in the medium
 
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