Question

Sound travels through rocks in the form of

• A. Non-elastic waves
• B. Only transverse and elastic waves
• C. Only longitudinal and elastic waves
• D. Both longitudinal, transverse and elastic waves

Answer 1

The correct option is D

Both longitudinal, transverse and elastic waves

Correct option is D: Both longitudinal, transverse and elastic waves.

Explanation:

1. In rock sound travels in the form of longitudinal, transverse and elastic waves.
2. In longitudinal wave, the vibration of particles along the direction of propagation of wave.
3. Transverse waves cause the medium to move perpendicular to the direction of the wave.
4. When particles are displaced in a medium, an elastic wave occurs in which a force proportionate to the displacement acts on the particles to return them to their original position. Sound waves are elastic waves.
5. Sound travel in the air only in the form of longitudinal wave.