Question

water has an index of refraction of 1.33. what is the speed of light in water

Answer 1

The index of refraction, often \(n\), compares the speed of light in a vacuum (fastest thing ever) to the speed of light in that medium (like water).
Specifically,
\(n=\dfrac cv\)

So an index of refraction will never be greater than 1.
Moreover, you can find the velocity of light in that medium.
By using some algebra moves,
\(v=\dfrac cn\)