A tuning fork of frequency n is held near the open end of a tube, which is closed at the other end, and the length of the tube is adjusted until resonance occurs. If the two shortest lengths to produce resonance are L 1 and L 2 , then the speed of the sound is

Question

A tuning fork of frequency n is held near the open end of a tube, which is closed at the other end, and the length of the tube is adjusted until resonance occurs. If the two shortest lengths to produce resonance are L 1 and L 2 , then the speed of the sound is, n ( L 2 - L 1 ), n L 2 - L 1 2, 4 n ( L 2 - L 1 ), 2 n ( L 2 - L 1 )

MARKS App · Accepted Answer

n = v 4 L 1 and n = 3 v 4 L 2 ∴ v = 4 n L 1 and 3 v = 4 n L 2 o r 2 v = 4 n L 2 - L 1 o r v = 2 n L 2 - L 1

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