Question

During the propagation of a longitudinal wave, in the region of compressions and rarefactions, Options:

• A. density varies
• B. density remains constant
• C. there is heat transfer
• D. Boyle’s law is obeyed

Hint:

For longitudinal waves, always remember that density varies in the regions of compression and rarefaction as the volume of the medium changes.

Answer 1

The Correct Option is A

1. A longitudinal wave involves oscillations of particles of a medium in the direction of wave propagation.
2. During the wave's travel, the medium undergoes alternating compression and rarefaction. In the compression region, particles are closely packed together, while in the rarefaction region, they are farther apart.
3. Since the density is defined as mass per unit volume, and volume changes in compression and rarefaction regions, the density of the medium will also vary.
4. Therefore, the correct answer is: \(\boxed{\text{density varies}}\).