In the resonance tube experiment , the first resonance is heard when length of air column is `l_(1)`
Channel: Doubtnut
Date: 26/07/2020

In the resonance tube experiment , the first resonance is heard when length of air column is `l_(1)` and second resonance is heard when length of air column is `l_(2)`. What should be the minimum length of the tube so that third resonance can also be heard.