Question

How does light behaves?

Answer 1

When light moves from one medium (like air) to another medium (like water) it will change directions. This is a "wave-like" behavior and is called refraction. In this way light behaves like other waves such as sound waves. The speed of the light wave also changes when it moves from medium to medium.

Answer 2

it starts in the air then it bounces of water which is refraction