Question

Which of the following best defines longitudinal wave?

A. In a longitudinal wave, particle displacement is parallel to the direction of wave motion.

B. In a longitudinal wave, particle displacement is above the direction of wave motion.

C. In a longitudinal wave, particle displacement is opposite to the direction of wave motion.

D. In a longitudinal wave, particle displacement is perpendicular to the direction of wave motion.

Answer 1

the one that best defines longitudinal wave is : A. in a longitudinal wave, particle displacement is parallel to the direction of wave motion
The particle will simply oscillate back and forth about their individual equilibrium positions

hope this helps

Answer 2

Answer: A. "In a longitudinal wave, particle displacement is parallel to the direction of wave motion."