A cylindrical tube open at both ends, has a vibrating air column of fundamental frequency ' f ' in air. The tube is dipped vertically in water so that half of its is in water. The fundamental frequency of the vibrating air column is now

Step-by-step solution

v= f Fundamental frequency's = v f f₀= v 2 L =f If the tube is dipped half into liquid then it acts as if closed at L 2 . See figure The frequency can be written as f _ c = v ₁ = v 2 ~L = f Fundamental frequency would remain the same ' f '.