Question

When sound travels through air, the particles present in air

• A. Vibrate along the direction of wave propagation
• B. vibrate in zig-zag manner
• C. vibrate perpendicular to the direction of wave propagation
• D. do not vibrate at all

Answer 1

The correct option is A

Vibrate along the direction of wave propagation

1. Sound is a form of energy that travels in the form of waves.
2. In these waves, the particles of the medium vibrate parallel to the direction of the propagation are called longitudinal waves.
3. Compression is the region of a longitudinal wave where the particles are most closely packed.
4. Rarefaction is the region of a longitudinal wave where particles are the most distant from one another.

Hence, the correct option is ( A).