Why does laser bend in water?

Laser light bends in water due to a phenomenon known as refraction, which occurs when light travels from one medium to another with a different density. Water is denser than air, causing the light waves to slow down and change direction as they enter the water. The degree of bending is determined by the angle of incidence and the refractive indices of the two media. This bending effect is why objects underwater appear to be at a different position than they actually are.