A sound source emits a mixture of two pure tones of different frequencies, f1 f_1\,f1 and f2f_2f2, where f1<f2f_1 < f_2f1<f2. This sound travels through an open doorway into a corridor.
Which of the following statements correctly describes the diffraction of these two sound waves as they pass through the doorway?
Neither sound wave diffracts, and both continue in a narrow, straight direction.
Both sound waves diffract by the same amount because they travel through the same doorway.
The sound wave with frequency f1f_1f1 diffracts (spreads out) more than the sound wave with frequency f2f_2f2.
The sound wave with frequency f2f_2f2 diffracts (spreads out) more than the sound wave with frequency f1f_1f1.
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.