Question

The absolute refractive indices of glass and water are 3/2 and 4/3. Determine the ratio of speed of light in glass and water.

Answer 1

Answer:

heya mate your ans is 8/9

Answer 2

Refractive index of glass =$\frac {3}{2}$

Refractive index of water =$\frac {4}{3}$

$\frac{ n_{w} }{ n_{g} } = \frac{ \frac{c}{ v_{w} } }{ \frac{c}{ v_{g} } }$

$\frac{ v_{g}}{ v_{w } } = \frac{ n_{w} }{ n_{g} }$

$\frac{ v_{g}}{ v_{w } } = \frac{ \frac{4}{3} }{ \frac{3}{2} }$

$v_{g}: v_{w} = 8:9$