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`

Answer

C

Explanation

(c ) As, `µ=(c)/(v)rArrvprop1/µ`
`therefore` `v_(1)/v_(2)=µ_(1)/µ_(2)`
`rArr` Ratio of velocities of light
`v_(g)/v_(w)=µ_(w)/µ_(g)=(4//3)/(3//2)=8/9`