Question

A narrow sound pulse (for example, a short pip by a whistle) is sent across a medium. (a) Does the pulse have a definite (i) wavelength, (ii) frequency, (iii) speed of propagation ? (b) If the pulse rate is `1` after every `20 s`, (i.e. the whistle is blown for a split second after every `20 s`) is the frequency of the note produced by the whistle equal to `(1)/(20) = 0.05 Hz` ?

Answer 1

Correct Answer - The pulse does not have a definite wavelength or frequency but has a definite speed of propagation (in a non-dispersive medium) (b) No.