Рет қаралды 1,037
9702/21/O/N/17: (a) State the difference between a stationary wave and a progressive wave in terms of
(i) the energy transfer along the wave,
(ii) the phase of two adjacent vibrating particles.
(b) A tube is open at both ends. A loudspeaker, emitting sound of a single frequency, is placed
near one end of the tube, as shown in Fig. 3.1.
The speed of the sound in the tube is 340 m s-1. The length of the tube is 0.60 m.
A stationary wave is formed with an antinode A at each end of the tube and two antinodes
inside the tube.
(i) State what is meant by an antinode of the stationary wave.
(ii) State the distance between a node and an adjacent antinode.
(iii) Determine, for the sound in the tube, the wavelength, and frequency
(iv) Determine the minimum frequency of the sound from the loudspeaker that produces a
stationary wave in the tube.
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