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CAIE A-Level Physics 8.1.3 Formation and Features of Stationary Waves

Practise explaining stationary-wave formation, locating nodes and antinodes, comparing phase and contrasting stationary with progressive waves.

Syllabus
2028–2030
Course
Physics 9702
Level
AS

Exam points

  • explain formation of a stationary wave from two waves travelling in opposite directions and identify nodes and antinodes
  • use a graphical method or displacement pattern to locate nodes, antinodes and phase relationships
  • compare stationary and progressive waves using energy transfer, amplitude variation or propagation features

8.1.3—The formation of a stationary wave using a graphical method, and identify question 1

[Maximum number: 1]

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.

Fig. 3.1

Fig. 3.1

The speed of the sound in the tube is 340 ms−1340 \mathrm{~ms}^{-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.

State what is meant by an antinode of the stationary wave.

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