The sound waves emitted by three sources A, B and C are represented in Fig. 10.31. If the frequency of A is maximum and C is minimum, identify the corresponding curves, and mark A, B and C on them.
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- Highest frequency (A) = curve with crests closest together (shortest wavelength).
- Lowest frequency (C) = curve with crests farthest apart (longest wavelength); B is in between.
Marking A, B and C
A: highest frequency, crests closest C: lowest frequency, crests farthest B lies in between