A person stands behind a thick concrete wall and is unable to see a loudspeaker on the other side. However, they can still hear the sound from the loudspeaker because the sound waves bend around the edge of the wall.
What is the name of this wave effect?
diffraction
dispersion
reflection
refraction
237 exam-style questions on CIE IGCSE Physics General properties of waves, covering General properties of waves. Each one has a worked solution and a mark scheme showing where the marks go.