A person standing behind a wide concrete pillar in a large hall can hear music from a speaker on the stage, even though they cannot see the speaker.
Which statement explains this observation?
The sound waves diffract around the edges of the pillar, whereas the wavelength of light is too small for noticeable diffraction.
The sound waves refract as they pass near the edges of the pillar, whereas light waves travel in straight lines.
The sound waves pass completely unaffected through the concrete pillar, whereas light waves are absorbed.
The sound waves reflect off the air molecules around the pillar, whereas light waves do not.
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.