A narrow sound pulse (for example, a short PiP by a whistle is sent across a medium.
(a) Does the pulse have a difinite (i) wavelength, (ii) frequency, (iii) speed of propagation ?
(b) If the pulse rate is 1 after energy 20 s, i.e., the whistle is blown for a split second after every 20 second), is the frequency of the note produced by the whistle equal to 1/20 = 0.05 Hz ?
(a) A short P by a whistle has neither a definite wavelength nor a definite frequency. However, its speed of propagation is fixed, being equal to speed of sound in air.
(b) No, frequency of the note produced by whistle is not 1/20 = 0.05 Hz. Rather 0.05 Hz is the frequency of repetition of the short P of the whistle