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8 marksProperties of Waves

CAPE Physics Unit 1 · 2004 · Paper 2 · Question 6(a)(i)

Explain what is meant by 'refraction of sound waves'.

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Other parts of this question

  1. 6(a)(ii)Draw sketches to show the refraction of sound waves as the waves travel from cool air to warmer air and from warm air to cooler air.[1 mark]
  2. 6(a)(iii)Hence explain why sound waves are more audible at night than in the day.[1 mark]
  3. 6(b)Using these data, calculate a value for the speed of sound in air.[4 marks]
  4. 6(c)(i)Calculate the amplitude of the wave at the chair on the perpendicular bisector (centre line) of the line between the speakers.[8 marks]
  5. 6(c)(ii)At what MINIMUM distance, D, to the right of this central chair is there a MAXIMUM in the sound intensity?[1 mark]

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