Whenever a wave reflects off the boundary between denser and less dense medium, in any direction, it will result in an inverted wave.

Question

Quizplus · Accepted Answer

When a wave reflects off a boundary from a denser to a less dense medium, it inverts. However, when reflecting from less dense to denser, it does not invert. The inversion depends on the direction of the density change at the boundary.

Whenever a Wave Reflects Off the Boundary Between Denser and Less