Physics

Problem

A fish rising vertically upward with a uniform velocity of

8 \text{ ms}^{-1}

, observes that a bird is diving vertically downward towards the fish with the velocity of

12 \text{ ms}^{-1}

. If the refractive index of water is

\frac{4}{3}

, then the actual velocity of the diving bird to pick the fish, will be _____

\text{ms}^{-1}