The refractive index of dense flint glass is $1.65$ and of turpentine oil is $1.47$ , with respect to air. What is the refractive index of dense flint glass with respect to turpentine oil?

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0.89

1.52

1.12

1.65

answer is C.

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Detailed Solution

The refractive index of a dense flint glass with respect to turpentine oil is

1.12

.
The relative refractive index of the two media is the ratio of the absolute refractive index of medium 2 to the absolute refractive index of medium 1. Medium 1 is the one from which the incident ray is coming.

n_{21} = \frac{n_{2}}{n_{1}}

\Rightarrow n_{21} = \frac{1.65}{1.47}

\Rightarrow n_{21} = 1.12

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