Question

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.

Answer 1

A corresponds to the curve with the shortest wavelength, i.e. the maximum number of oscillations in the given distance. C corresponds to the curve with the longest wavelength, i.e. the fewest oscillations. B corresponds to the intermediate curve.