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GK QUESTION#3054

A sound wave travels through a medium at 340 m/s with a frequency of 680 Hz. What will be its wavelength?

  1. A0.5 mCorrect answer
  2. B2 m
  3. C20 m
  4. D50 m
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Answer

A. 0.5 m

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Explanation

Wave speed, frequency and wavelength obey v = fλ. Hence λ = 340/680 = 0.5 m. The unit is metres because speed in m/s is divided by frequency in s⁻¹.

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