Question

A longitudinal wave travels in the form of alternate compressions and rarefactions.

• A. True
• B. False

Answer 1

The correct option is A True

1. Longitudinal waves are waves in which the displacement of the medium is in the same direction as, or the opposite direction to, the direction of travel of the wave.
2. In fact, sound waves are longitudinal waves in which alternate zones of compressions and rarefactions are formed.
3. In a wave motion, the medium particles oscillate to and fro about their respective mean positions but sound energy, as a whole propagates in all directions throughout the medium.

Hence, the given statement is true.