When a ray of light hits a surface and part of "back to back", we say that was reflected.
It is called normal to line N, which is perpendicular to the surface at the point where the beam focuses.
Flame incident angle is the angle that the incident beam makes with the normal (A).
Flame reflected angle is the angle that the reflected beam makes with the normal (B).
Reflection laws
The angle that the ray makes with the normal when it hits the surface, is equal to the angle it makes with the normal to be reflected.
The normal line, the incident ray and the reflected ray are all on the same plane.
The thought never happens in isolation. In fact, when the incident ray hits the surface that separates the two media, part of it is absorbed and other part may undergo refraction. Thus, the intensity of light reflected waves is always lower than the intensity of the incident waves.
The reflection of light is represented on the poster.
Note: The addressed topics refer to specular reflection, which occurs at very smooth surfaces. It also happens reflection on uneven surfaces (diffuse reflection), occurring, however, dispersion luz.Verifica It is still the total reflection phenomenon in optical fiber, covered in Powering the World.