A narrow sound pulse (for example, a short pip by a whistle) is sent across a medium.
(i) Does the pulse have a definite (a) frequency, (b) wavelength, © speed of propagation?
(ii) If the pulse rate is 1 after every 20 s, (that is the whistle is blown for a split of second after every 20 s), is the frequency of the note produced by the whistle equal to 1/20 or 0.05 Hz?
(i) A short pip by a whistle
(a) will not have fixed wavelength.
(b) will not have a fixed frequency.
© will have definite speed that will be equal to speed of sound in air.
(ii) 0.05 Hz will be the frequency of repetition of the short pip.