The optical path of a monochromatic light is | vedclass

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(B) The optical path length is defined as the product of the refractive index $(\mu)$ and the geometric path length $(x)$.Given that the optical path

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$1.36$

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(B) The optical path length is defined as the product of the refractive index $(\mu)$ and the geometric path length $(x)$.Given that the optical path is the same for both media,we have:$\mu_{glass} 	imes x_{glass} = \mu_{water} 	imes x_{water}$Substituting the given values:$1.53 	imes 4.0 = \mu_{water} 	imes 4.5$$\mu_{water} = \frac{1.53 	imes 4.0}{4.5}$$\mu_{water} = \frac{6.12}{4.5} = 1.36$Therefore,the refractive index of water is $1.36$.

The optical path of a monochromatic light is the same if it goes through $4.0 \, cm$ of glass or $4.5 \, cm$ of water. If the refractive index of glass is $1.53$,the refractive index of water is:

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