a tuning fork sends sound waves in air . if the temperature of air increases ,which of the following parameters will change ?
a] time period b] frequency c] wavelegth d] all of these
rosy295:
The frequency of a wave depends on the source by which the waves are produced. The frequency of a wave is fixed and does not change even when it passes through different substances. However, the speed of sound changeswhen it travel to one medium to anothe. As v=f×lambda, where v is the speed of sound,, f is the frequency and lambda is The wavelength of sound.
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Answer: The right possibility is possibility 'c'.
Explanation: If the temperature T rises, the speed of sound v rises further, and since λ=v/f, as v rises, λ(wavelength) rises further.
Frequency is decided by the supply of sound, hence it's unaffected by temperature, and since T=1/f, the period of time remains constant.
Amplitude is decided by the number of energy applied to the fork and is hence unaffected by temperature changes.
Therefore, wavelength can change.
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