Question

Assertion (A): Longitudinal waves can travel through all media, i.e., solids, liquids and gases.

Reason (R): In case of longitudinal waves, one wavelength contains one compression or one rarefaction.

Options

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

• If both Assertion and Reason are true, but Reason is not correct explanation of the Assertion.

• If Assertion is true, but the Reason is false.

• If Assertion is false, but the Reason is true.

Answer 1

If Assertion is true, but the Reason is false.

Explanation:

Assertion (A) is true. Longitudinal mechanical waves can travel through solids, liquids, and gases.

Reason (R) is false. One wavelength of a longitudinal wave consists of one compression and one rarefaction, not one compression or one rarefaction. Also, wavelength is the distance between two successive compressions or two successive rarefactions.

Therefore, A is true, but R is false.