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2 marksProperties of Waves

CAPE Physics Unit 1 · 2008 · Paper 2 · Question 2(a)(iii)

Plane waves are incident on small apertures, as shown in Figure 1.

Mark on Figure 1, TWO places where constructive interference occurs and TWO places where destructive interference occurs. (Use a circle O for constructive interference and an X for destructive interference.)

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Other parts of this question

  1. 2(a)(i)What is meant by the term 'diffraction'?[1 mark]
  2. 2(a)(ii)Show on the diagram, the resulting waves after passage through the slits.[2 marks]
  3. 2(a)(iv)In the space below draw wave diagrams to show how TWO waves could superpose to produce constructive and destructive interference.[2 marks]
  4. 2(b)(i)Calculate the value of θ.[5 marks]
  5. 2(b)(ii)Explain why at Q, a point midway between P and R, the signal received is very weak.[1 mark]
  6. 2(b)(iii)At what angle to the mid-line would the next minimum of the interference pattern occur?[2 marks]

More practice: the rest of this paper · more Properties of Waves questions · all CAPE Physics Unit 1 past papers