Two out-of-phase waves of the same frequency that are moving through the same medium are said to present which type of interference?

When two out-of-phase waves of the same frequency travel through the same medium, they undergo destructive interference. This occurs when the crest of one wave aligns with the trough of another wave, leading to a cancellation effect. Specifically, when the paths of the two waves meet, the amplitude resulting from their interaction is decreased or minimized. This is a key characteristic of destructive interference, where the resultant wave has less energy and amplitude than either of the original waves.

In contrast, constructive interference occurs when two waves are in phase, leading to an increase in amplitude. Subtractive interference is not a standard term used in wave interference contexts and does not correctly describe the phenomenon. Reinforcing is another term that implies constructive interference rather than the reduction of amplitude seen in destructive interference. Thus, the concept of waves being out of phase directly correlates with reducing their combined amplitude, clearly illustrating why the correct answer is destructive interference.