The student faces the two loudspeakers at point A. Point A is at equal distances from P and Q. He then moves to point B, at right angles to the line OA, still facing the two loudspeakers. As his head moves from A to B the amplitude of the sound wave he hears decreases and then increases. The amplitude starts to decrease again as he moves beyond B. Explain why the variation in amplitude occurs as he moves from A to B.
The student faces the two loudspeakers at point A. Point A is at equal distances from P and Q. He then moves to point B, at right angles to the line OA, still facing the two loudspeakers. As his head moves from A to B the amplitude of the sound wave he hears decreases and then increases. The amplitude starts to decrease again as he moves beyond B. Explain why the variation in amplitude occurs as he moves from A to B.
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Solve question-1 which is in the picture
Transcribed Image Text:Question:1
The student faces the two loudspeakers at point A. Point A is at equal distances from
P and Q.
He then moves to point B, at right angles to the line OA, still facing the two
loudspeakers.
As his head moves from A to B the amplitude of the sound wave he hears decreases
and then increases. The amplitude starts to decrease again as he moves beyond B.
Explain why the variation in amplitude occurs as he moves from A to B.
Transcribed Image Text:A student investigates the interference of sound waves using two loudspeakers,
P and Q, connected to a signal generator (oscillator). Each loudspeaker acts as a
point source of sound.
Figure 3 shows the arrangement.
Figure 3
B.
signal
generator
plan view
not to scale
Point O is the midpoint between P and Q.
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