Velocity of sound in vacuum is ____________________?
Correct answer: C. Zero
- A. 332 ms-1
- B. 320 ms-1
- C. Zero
- D. 224 ms-1
Explanation
Sound is a mechanical wave and requires particles to transmit vibrations, but a vacuum contains no material particles. Therefore, the speed of sound in vacuum is zero. The likely mistake is choosing 332 m s-1, which is approximately the speed of sound in air under ordinary conditions.
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About Speed of Sound
The speed of sound depends on the properties of the medium, including its elasticity and density, and in gases it varies mainly with temperature. Questions connect speed with frequency and wavelength, compare sound in solids, liquids and gases, and distinguish the speed of propagation from the oscillating particles' motion.
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