When a wave is reflected, it means that the wave bounces off a surface or boundary and changes direction. Reflection occurs when a wave encounters an obstacle or a different medium that does not allow the wave to pass through. The incident wave transfers energy to the boundary, and an equal amount of energy is transferred back, causing the wave to bounce off the surface. The angle of incidence (the angle between the incident wave and the normal line drawn perpendicular to the surface) is equal to the angle of reflection (the angle between the reflected wave and the normal line), according to the law of reflection. Reflection can occur in various types of waves, such as light waves, sound waves, and water waves.
