Question

A wave hits a wall as shown.

A brick wall with a green arrow pointing to the wall from below and right at a shallow angle. Another green arrow starts where the first arrow touched the wall and goes up and left at the same shallow angle.

As the wave interacts with a wall, which kind of wave interaction is shown?

absorption
diffraction
refraction
reflection

Answer 1

Reflection — the incoming and outgoing arrows make equal angles with the surface (angle of incidence = angle of reflection).