Which wave oscillates parallel to the motion of the sound wave?
Show answer & explanation
Correct answer: D
Explanation
The correct answer is option 4 i.e. Longitudinal wave.
The wave that oscillates parallel to the motion of the sound wave is called a longitudinal wave. In longitudinal waves, the particles of the medium move back and forth in the same direction as the wave travels. This movement creates compressions and rarefactions in the medium, which allows sound waves to propagate. For instance, in air, when a sound wave travels, air molecules vibrate parallel to the direction of the wave, resulting in the transfer of sound energy through the medium.