the tuning fork is kept in vertical plane or horizontal plane in resonance column tube experiment
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In an experiment to determine the speed of sound using a resonance column , prongs of the tuning fork are kept in a vertical plane so that both the prongs can send sound waves inside the tube .
In one resonance the length of resonating air column is ,
l
1
=λ/4 ,
and in another resonance the length of resonating air column is ,
l
2
=3λ/4 ,
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