How does a spring pulse reflected from a rigid wall differ from the incident pulse?

When a spring pulse reflects off a rigid wall, it undergoes an inversion, meaning that the reflected pulse is upside down compared to the incident pulse. This occurs because the rigid wall exerts an equal and opposite force on the pulse, causing it to flip. As a result, while the shape of the pulse remains the same, its amplitude is inverted. In contrast, if the wall were not rigid, the pulse might reflect without inversion, maintaining its original orientation.