NEET Physics Wave Motion Assertion Reason Question
Assertion (A): The speed of sound in air at STP is lower according to Newton's formula compared to experimental values.
Reason (R): Newton assumed that pressure variations during sound propagation are isothermal.
Both A and R are true, and R is the correct explanation of A.
Both A and R are true, but R is not the correct explanation of A.
A is true, but R is false.
A is false.
Correct Answer
Detailed Explanation
The NCERT context explains that Newton's assumption of isothermal conditions leads to a smaller calculated speed of sound, which Laplace corrected by considering adiabatic conditions.
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