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) wavelength, (b) frequency, (c) speed of propagation? (ii) If the pulse rate is 1 after every 20s (i.e the whistle is blown for a split second after every 20s), is the frequency of the note produced by the whistle equal to 1/20 = 0.05 Hz?
Asked by Topperlearning User | 22nd May, 2015, 02:53: PM
(i) The pulse does not have a definite wavelength or frequency, but has a definite speed of propagation (in a non-dispersive medium).
(ii) The frequency of the note produced by the whistle is not equal to 1/20 or 0.05 Hz, it is the frequency of pulse repetition.
Answered by | 22nd May, 2015, 04:53: PM
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