An organ pipe 0.50 m long is closed at one end. What is its fundamental frequency (speed of sound = 340 m/s)?
Correct answer B. 170 Hz
Explanation
For a closed pipe the fundamental has a node at the closed end and an antinode at the open end, so L = λ/4. Hence f = v/4L = 340/2.0 = 170 Hz.
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