If $L_1$ and $L_2$ are the lengths of the first and second resonating air columns in a resonance tube, then the wavelength of the note produced is
If $L_1$ and $L_2$ are the lengths of the first and second resonating air columns in a resonance tube, then the wavelength of the note produced is
- A
$2(L_2 + L_1)$
- B
$2(L_2 - L_1)$
- C
$2\left( {{L_2} - \frac{{{L_1}}}{2}} \right)$
- D
$2\left( {{L_2} + \frac{{{L_1}}}{2}} \right)$
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