In the experiment to determine the speed of sound using a resonance column,
  • 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 wavelength of sound in air
IIT 2007,IIT 2006, Advanced
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