A student standing in a hallway is able to hear music playing from a speaker inside a classroom, even though they do not have a direct line of sight to the speaker. The sound waves bend and spread out around the edges of the doorway to reach the student. What is the name of this wave effect?
refraction
reflection
diffraction
dispersion
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.