A sound wave travels with a speed of 330ms−1 in air. If the wavelength of the wave is 3.3m, then the frequency of the wave is:
Correct answer: B. 100 Hz
- A. 50 Hz
- B. 100 Hz
- C. 150 Hz
- D. 200 Hz
Explanation
The following is the solution:since v = f × λ330 = f × 3.3f = 100 HzSo the answer is B.
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About Waves
Progressive waves transfer energy through oscillations, with wavelength, frequency, amplitude and wave speed related by v = fλ; sound speed depends on the medium. Superposition produces interference and stationary waves in strings and organ pipes, while simple harmonic motion describes the oscillation itself and must be distinguished from wave propagation.
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