The angle between the incident ray and the normal ray is called the angle of incidence.

Here's a breakdown:

* Incident ray: The light ray that strikes a surface.

* Normal ray: An imaginary line perpendicular to the surface at the point where the incident ray strikes.

* Angle of incidence: The angle formed between the incident ray and the normal ray.

Let me know if you'd like a diagram or more explanation about reflection and refraction!