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upteto17 q144

0. Sound waves consist of 20 compressions and 20 rarefactions in 10m length. The wavelength of the waves is

  • Option : B
  • Explanation : (B) One compression and one rarefaction constitutes one wave. The length between the compression and rarefaction is called wavelength.
    Here 20 compressions and 20 rarefactions shall from 20 waves. These are have length of 20 waves.
    So, 20 x λ = 10 m = 1000 cm
    ∴ Wavelength, λ = 50 cm
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