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NEETPhysicsWaves and Sound

Assertion: Longitudinal waves are called pressure waves. Reason: Propagation of longitudinal waves through a medium involves changes in pressure.

Options

  1. AIf both Assertion and Reason are correct and Reason is the correct explanation of Assertion.
  2. BIf both Assertion and Reason are true but Reason is not the correct explanation of Assertion.
  3. CIf Assertion is true but Reason is false.
  4. DIf Assertion is false but Reason is true.

Correct answer

A. If both Assertion and Reason are correct and Reason is the correct explanation of Assertion.

Step-by-step solution

"Longitudinal waves are called pressure waves." ( ) True - because compressions and rarefactions cause local pressure variations. Reason: "Propagation of longitudinal waves through a medium involves changes in pressure." ( ) True - the wave consists of alternate high-pressure (compression) and low-pressure (rarefaction) regions. And the Reason correctly explains the Assertion.

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