Q 1115434369.     In the experiment to determine the speed of sound using a resonance column,

JEE 2007
A

prongs of the tuning fork are kept in a vertical plane

B

prongs of the tuning fork are kept in a horizontal plane

C

in one of the two resonances observed, the length of the resonating air column is close to the wavelength of sound in air

D

in one of the two resonances observed, the length of the resonating air column is close to half of the wave length of sound in air

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