When a sound wave moves through a medium such as air, the motion of the molecules of the medium is in what direction (with respect to the motion of the sound wave)?
A) perpendicular
B) parallel
C) anti-parallel (in opposite direction)
D) Both choices B and C are valid.

Question

Quizplus · Accepted Answer

The motion of the molecules of the medium is both parallel and anti-parallel to the motion of the sound wave.

When a Sound Wave Moves Through a Medium Such as Air