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Q.

The absolute refractive index of any medium is always ________. 

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a

1

b

<1

c

>1

d

Zero

answer is B.

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Detailed Solution

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  • The ratio of the speed of light in the vacuum to the speed of light in the medium is known as the absolute refractive index of any media.
  • The absolute refractive index is always larger than one because light travels at its fastest rate in a vacuum.
  • Any medium has an absolute refractive index μ = cvthat is higher than 1.
  • Due to the fact that the speed of light in any medium is always slower than the speed in a vacuum (i.e. μ < C).
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