A tuning fork produces a sound of frequency 256 Hz. If the speed of sound in air is 340 m/s, the wavelength of the sound in air is approximately:
A1.33 m
B0.66 m
C256 m
D2.0 m
Answer & Solution
Correct answer: A. 1.33 m
λ = v / ν = 340 m/s / 256 Hz ≈ 1.33 m. So a 256 Hz sound in air has a wavelength of about 1.33 metres — comparable to a person's height.
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