Choose the correct option for the following Assertion (A) and Reason (R).

Question

G1 Physics · Accepted Answer

For an open organ pipe, fₙ = nf₁, so frequencies f₁, 2f₁, 3f₁, ... are allowed. For a pipe closed at one end, fₙ = (2n−1)f₁, so the allowed frequencies are f₁, 3f₁, 5f₁, ... Therefore the second harmonic 2f₁ is absent in the ideal closed pipe. Both Assertion and Reason are true, and the Reason correctly explains the Assertion. Correct option: A.