Question 23
SoundIn a resonance tube experiment which is illustrated in Fig. 6, the velocity of sound in air is 327.68 m/s, the frequency of the tuning fork used is therefore
- A.128 Hz
- B.256 Hz
- C.512 Hz
- D.768 Hz
- E.1024 Hz
Show the answer and explanation
Answer: C (512 Hz)
Explanation
At the first resonance the 16 cm air column is a quarter wavelength, so λ = 64 cm = 0.64 m. f = v/λ = 327.68/0.64 = 512 Hz.