Absolute refractive indices of glass and water are `3//2` and `4//3`. The ratio of velocity of light in glass and water will be

Options

A. `4 : 3`
B. `9 : 8`
C. `8 : 9`
D. `3 : 4`

Explanation

As, `mu=(c)/(v)impliesvprop(1)/(mu)`
`therefore (v_(1))/(v_(2))=(mu_(2))/(mu_(1))`
implies Ratio of velocities of light
`(v_(g))/(v_(w))=(mu_(w))/(mu_(g))=(4//3)/(3//2)=(8)/(9)`