Ten complete waves pass through a point in 2 seconds. If the wavelength is 20 cm, what is the speed of the wave?
Correct answer: A. 1 m/s
- A. 1 m/s
- B. 10 m/s
- C. 2 m/s
- D. 40 m/s
Explanation
Frequency=10/2=5HzWavelength=0.20mVelocity= frequency x wavelength=1m/s
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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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