Where does wave reflection occur?
at boundaries between two different media
while a wave is propagating through a single media
when two waves moving in opposite directions collide
none of the above
The correct answer for the question that is being presented above is this one: "none of the above." Wave reflection happens there is a change in direction of a wavefront. This wavefront is at an interface between two different media, which makes the wavefront returns into where it is originated.