Which statements are correct for a resonance-column experiment using a tube that is open at the top and closed by a water surface at the bottom?
Select all that apply

Question

Which statements are correct for a resonance-column experiment using a tube that is open at the top and closed by a water surface at the bottom?

G1 Physics · Accepted Answer

The water surface behaves like the closed end of a pipe and is therefore a displacement node. The open end has a displacement antinode slightly outside the tube, which is represented by the end correction e. For the first two resonances, l₁+e = λ/4, l₂+e = 3λ/4. Subtracting gives l₂−l₁ = λ/2. Eliminating λ gives e = (l₂−3l₁)/2. Therefore all four statements are correct.