Sound · Class 9 · CBSE Science

If the velocity of a sound wave is 340text{ m/s} and its frequency is 170text{ Hz}, what is its wavelength?

Practice question from Sound (Class 9 · CBSE Science), with the correct answer and a step-by-step solution.

medium · MCQ · Q-C34507

If the velocity of a sound wave is $340\text{ m/s}$ and its frequency is $170\text{ Hz}$ , what is its wavelength?

A.0.5 m
B.2 mCorrect answer
C.510 m
D.1.5 m

Solution

Using the wave equation $v = \lambda \nu$ , where $v$ is velocity, $\lambda$ is wavelength, and $\nu$ is frequency. Substituting the values: $340 = \lambda \times 170$ , which gives $\lambda = \frac{340}{170} = 2\text{ m}$ .

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