Q: Which among the following is true for propagation of sound waves?
(a)Sound can travel in vacuum and it is a transverse wave in air.
(b)Sound cannot travel in vacuum and it is a longitudinal wave in air.
(c)Sound can travel in vacuum and it is a longitudinal wave in air.
(d)Sound cannot travel in vacuum and it is a transverse wave in air.
Correct Answer: (b)