Question

You hear the sound of people talking through the open door in a classroom down the hall. This is an example of _____.

refraction
diffraction
the angle of incidence
reflection

Answer 1

This is an example of sound waves undergoing diffraction. Diffraction is the bending of waves around obstacles or through openings. In this case, the sound waves are bending around the open door, allowing them to be heard down the hall.