The absolute refractive indices of glass and water are 1.5 and 1.33 respectively. In which medium does light travel faster? Calcute the ratio of speeds of light in thw two media?

Speed of light in medium $=$ Speed of light in vacuum $/$ refractive index of the medium
Speed of light in water $=$c$/$1$·$33
Speed of light in water glass$=$c$/$1$·$5
So we can say that the speed of light in water is greater than that in glass.

Ratio of speed of light in glass and water = 1$·$33​$/$1$·$5 = 0.886667