Physics · JEE | WAVES

Given below are two statements: one is labelled as Assertion (A) and the other is labelled as Reason (R). Assertion (A): Laplace correction to Newton's formula for the speed of sound in gas accounts for the isothermal nature of sound propagation. Reason (R): Compression and rarefaction in sound wave propagation happen so rapidly that heat flow between regions is negligible, making the process adiabatic. In the light of the above statements, choose the correct answer from the options given below:

1. A
   Both (A) and (R) are true and (R) is the correct explanation of (A).
2. B
   Both (A) and (R) are true but (R) is NOT the correct explanation of (A).
3. C
   (A) is true but (R) is false.
4. D
   (A) is false but (R) is true.