Incident Ray:
The incident ray is the ray of light that strikes a reflecting surface. It is the ray that comes from a source of light and falls on the surface. When light encounters a surface, it can be absorbed, transmitted, or reflected.

Reflecting Surface:
A reflecting surface is a surface that reflects light. It can be a mirror, a shiny metal surface, or any other surface that has the ability to reflect light. When light falls on a reflecting surface, it follows the laws of reflection and is either absorbed or reflected.

Explanation:
When light strikes a reflecting surface, it undergoes reflection. Reflection is the process by which light bounces off a surface. The angle at which the incident ray strikes the surface is called the angle of incidence. The angle at which the reflected ray bounces off the surface is called the angle of reflection. According to the laws of reflection, the angle of incidence is equal to the angle of reflection.

The ray of light that strikes the reflecting surface is called the incident ray. It is called so because it is the ray that is incident or falling upon the surface. The incident ray is an important concept in the study of optics and helps us understand how light behaves when it interacts with different surfaces.

The reflected ray, on the other hand, is the ray of light that bounces off the reflecting surface after reflection. It is the ray that is reflected or sent back from the surface. The angle between the incident ray and the reflected ray is called the angle of reflection.

In conclusion, the incident ray is the ray of light that strikes the reflecting surface, while the reflected ray is the ray that bounces off the surface after reflection. The incident ray and the reflected ray are both important in understanding the behavior of light during reflection.