A spectator sits in the stadium stands, 170 m away from a referee. The spectator observes that they see the referee blow their whistle before they hear the sound.
What is the reason for this delay?
Light travels much faster than sound.
Sound waves travel faster as they cover more distance.
Human visual processing is always faster than auditory processing.
Sound waves are absorbed by the air, slowing them down before they reach the spectator.
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.