The velocity of sound in air at NTP is 332 ms−1. The velocity of sound in vacuum is:
Correct answer: D. Not defined
- A. 332 ms−1
- B. 166 ms−1
- C. 88 ms−1
- D. Not defined
Explanation
Explanation: Sound waves require a medium to propagate. In a vacuum, there are no particles to carry the sound waves.
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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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