A hiker stands opposite a steep mountain cliff and shouts. A short time later, she hears her voice return to her as an echo.
Which wave behavior is responsible for the production of this echo when the sound waves encounter the cliff face?
Absorption
Diffraction
Reflection
Refraction
295 exam-style questions on CIE IGCSE Physics Sound, covering Sound. Each one has a worked solution and a mark scheme showing where the marks go.