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CBSE-XI-Physics

16: Sound Wave

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  • #4
    A tuning fork sends sound waves in air. If the temperature of the air increases, which of the following parameters will change?
    (a) Displacement amplitude
    (b) Frequency
    (c) Wavelength
    (d) Time period
    digAnsr:   c
    Ans : (c) Wavelength
    The velocity of a sound wave varies with temperature as follows:
    `` v\propto \sqrt{T}``
    As the temperature increases, the speed also increases. However, since the frequency remains the same, its wavelength changes.
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