Question

Velocity of sound in vacuum is

• A. zero
• B. $330\,ms^{-1}$
• C. $360\,ms^{-1}$
• D. $660\,ms^{-1}$

Answer 1

Answer: (A)

zero

Answer 2

Sound waves are mechanical waves. These waves require a medium for their propagation. They cannot propagate through vacuum.