Question

if light rays are incident on an air bubble inside water why the light rays divergent?

Answer 1

Direction of bending. When a ray of light passes from a less dense material (eg air) into a denser material (eg glass or water) it is bent away from the surface between the two materials. This means that in this situation the angle of refraction is always less than the angle ofincidence.

Answer 2

Inside water, the air bubble behaves like a Concave lens. The concave lenses are known as diverging lenses as the rays diverge after falling on the concave lens. ... Since the water refractive index is greater than air, the air bubbles in the water will behave like a concave lens.