Physics
Grade-8
Easy

Question

The pressure of a medium _____ when a longitudinal wave propagates through it.

  1. Becomes uniform
  2. Stays the same
  3. Becomes non-uniform
  4. Dilutes

Hint:

The longitudinal waves are called pressure waves. Propagation of longitudinal waves through a medium involves changes in pressure and volume of air when compression and rarefaction are formed.

The correct answer is: Becomes non-uniform


    • The particles in a medium move back and forth in longitudinal waves.
    • It creates a pattern of compressions (high-pressure regions) and rarefactions (low-pressure regions).
    • Therefore the pressure of a medium becomes non-uniform.
    • So, the correct option is c.

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