Angle of reflection

The angle of reflection is the angle at which a wave or light bounces off a surface compared to a line perpendicular to that surface, called the normal. When light hits a mirror, for example, it reflects off at an equal angle to the angle it arrived—meaning if it strikes the surface at a 30-degree angle to the normal, it will bounce off at the same 30 degrees on the other side. This principle applies to all reflective surfaces and helps explain how and why reflections appear the way they do.