A bat emits high-frequency sound waves (ultrasound) to detect a nearby insect. Shortly after, the bat detects the return of the wave as an echo.
Which wave phenomenon is primarily responsible for the production of this echo?
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.