Question

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

The question was posed to me during an internship interview.

The origin of the question is Transverse Waves topic in division Waves of Engineering Physics I

Answer 1

The correct choice is (a) Prongs of the tuning fork are kept in a vertical plane

For explanation I would say: The prongs of the vibrating tuning fork are kept in a vertical plane just above the opening of the resonance tube.