Reflection
Reflection is the change in direction of a wave after bouncing off a substance.
The first law of reflection is the angle of incidence is equal to the angle of reflection.
The second law of reflection is the incident ray, the reflected ray and the normal are all in the same plane.
The second law of reflection is the incident ray, the reflected ray and the normal are all in the same plane.
The pulse reflects on the same side when it reflects off a free end.
The pulse reflects on the opposite side when it reflects off a fixed end.