3.1. General properties of waves
A subsection of Physics, 0625, through 3. Waves
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shows a loudspeaker that is producing a sound wave in air of frequency 15 000 Hz. hollow paper cone Describe how the cone of the loudspeaker produces this sound. The speed of sound in air is 330 m / s. Calculate the wavelength of this sound. wavelength = The loudspeaker is placed a considerable distance to the left of a barrier with a gap. The width of the gap is double the wavelength of the sound. Sound from the loudspeaker reaches the barrier and passes through the gap. shows the gap in the barrier. barrier barrier (not to scale) On , sketch a diagram that represents the sound wave as a series of wavefronts • travelling towards the barrier • in the gap • and travelling away from the barrier.
0625_w19_qp_41
THEORY
2019
Paper 4, Variant 1
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338