Wavelength of wave ⇒λ=fv=400336=84cm
At first resonance
4λ=l+e⇒484=20+e, where, e is end correction.
⇒e=1
So third resonance length
54λ=l2+e
5(21)=l2+1
l2=104cm
In an experiment to determine the velocity of sound in air at room temperature using a resonance tube, the first resonance is observed when the air column has a length of 20.0cm for a tuning fork of frequency 400Hz is used. The velocity of the sound at room temperature is 336ms−1. The third resonance is observed when the air column has a length of _____ cm
Held on 29 Jun 2022 · Verified 6 Jul 2026.
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