With respect to air, the refractive index of a flint glass and alcohol is $1.65$ and $1.36$ respectively. Calculate the refractive index of the flint glass with respect to alcohol.
1.21

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Solution

The correct option is A 1.21
Given:
Refractive index of flint glass with respect to air, $n_{f} = 1.65$
Refractive index of alcohol with respect to air $n_{a} = 1.36$

Let the refractive index of flint glass with respect to alcohol be $n_{f a}$ .

From definition of refractive index,
$n_{f a} = \frac{n_{f}}{n_{a}}$
$n_{f a} = \frac{1.65}{1.36} = 1.21$

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With respect to air, the refractive index of a flint glass and alcohol is 1.65 and 1.36 respectively. Calculate the refractive index of the flint glass with respect to alcohol.1.21

The correct option is A 1.21Given: Refractive index of flint glass with respect to air, nf=1.65 Refractive index of alcohol with respect to air na=1.36 Let the refractive index of flint glass with respect to alcohol be nfa. From definition of refractive index, nfa=nfna nfa=1.651.36=1.21

With respect to air, the refractive index of a flint glass and alcohol is $1.65$ and $1.36$ respectively. Calculate the refractive index of the flint glass with respect to alcohol.
1.21