1.

The absolute refractive index of water is 1.36.What is the velocity of light in water ?

Answer»

Solution :Given : `v_(1)=3XX10^(8)`m//s,n=1.36
To FIND : velocity of light in water `(v_(2))`
n=`v_(1)/v_(2)`
1.36=`(3xx10^(8))/(v_(2))`
` v_(2)=(3xx10^(8))/(1.36)
`=2.21xx10^(8)` m//s
Velocity of light in water is `2.21xx10^(8)` m//s


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