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Does The Pulse Have A Definite (a) Frequency, (b) Wavelength, (c) Speed Of Propagation?

Sujoy Das
26/02/2018 0 0

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, (c) speed of propagation?

ii. If the pulse rate is 1 after every 2s, (that is the whistle is blown for a split of second after every 20s), is the frequency of the note produced by the whistle equal to 1/20 or 0.05 Hz?

 Answer:

i. A short pip by a whistle

a. Will not have fixed wavelength.

b. Will not have a fixed frequency.

c. 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.

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