Question

Consider the following statements about sound passing through a gas.
(A) The pressure of the gas at a point oscillates in time.
(B) The position of a small layer of the gas oscillates in time.
(a) Both A and B are correct.
(b) A is correct but B is wrong.
(c) B is correct but A is wrong.
(d) Both A and B are wrong.

Answer 1

First Option is Correct.

Explanation:

When the pressure gets oscillated at any point then there is the production of Longitudinal Waves or in simple terms, SOUND is Produced.

And we know that such waves helps in formations of Closer or nearer part (Compressions) and further part (rarefactions).  

So that part of gas does not move by itself, and disturbance is being caused owing to the change in Pressure.