When light travels from air to water from water to glass, again from glass to $C O_{2}$ gas and finally through air. The relation between their refractive indices will be given by

_{a} n_{w} \times_{w} n_{g l} \times_{g l} n_{g a s} \times_{g a s} n_{a} = 1

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_{a} n_{w} \times_{w} n_{g l} \times_{g a s} n_{g l} \times_{g l} n_{a} = 1

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_{a} n_{w} \times_{w} n_{g l} \times_{g l} n_{g a s} = 1

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Their is no such relation

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Solution

The correct option is A $_{a} n_{w} \times_{w} n_{g l} \times_{g l} n_{g a s} \times_{g a s} n_{a} = 1$
ATQ,
$_{a} n_{w} \times_{w} n_{g l} \times_{g l} n_{g a s} \times_{g a s} n_{a} = \frac{n_{w}}{n_{a}} \times \frac{n_{g l}}{n_{w}} \times \frac{n_{g a s}}{n_{g l}} \times \frac{n_{a}}{n_{g a s}} = 1$

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The refractive index of glass for light going from air to glass is $\frac{3}{2} .$ Glass to air will be :

(a) $\frac{2}{3}$

(b) $\frac{4}{5}$

(d) $\frac{5}{2}$

i,

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