Which of the following is the best definition of longitudinal wave?

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

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

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

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

Question

Which of the following is the best definition of longitudinal wave?
	
In a longitudinal wave, particle displacement is parallel to the direction of wave motion.
	
In a longitudinal wave, particle displacement is above the direction of wave motion.
	
In a longitudinal wave, particle displacement is opposite to the direction of wave motion.
	
In a longitudinal wave, particle displacement is perpendicular to the direction of wave motion.

shamim · Answer

Sound wave is an example of longitudinal wave

shamim · Answer

Do u know hw the molecules of air vibrate during sound wave propagate through air medium

shamim · Answer

Air molecules vibrate along velocity of   sound wave in air medium

shamim · Answer

We should discuss abt transverse wave too