Question

Velocity of sound in air is 332 m s−1. Its velocity in vacuum will be
(a) > 332 m s−1
(b) = 332 m s−1
(c) < 332 m s−1
(d) meaningless.

Answer 1

Velocity of sound in air is 332 m s−1. Its velocity in vacuum will be meaningless.

Explanation:

• Sound wave is a mechanical wave, which means you need a travel medium. Therefore vacuum velocity is zero.

• The speed of sound in a vacuum is zero meters per second because the sound cannot move in a vacuum.
• Sound is a wave, which means it is transmitted by the vibration of particles in a medium such as water or air. Because the vacuum is a space, there is no medium through which sound can move .