Question

A cylinderical tube open at both ends , had a fundamental frequency f, in air . the tube is dipped vertically in water so that half of it is in water . the fundamental frequency of the air -column is now ​

Answer 1

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Answer 2

Explanation :- initially fir open pipe , fundamental frequency V₀ = V/2L = f (given)

But , when it is halt dipped in water , then it becomes closed organ pipe of length L/2 in this case , fundamental frequency

V' = v/4L' = V/4× L/2 = V/2L = f

∴ fundamental frequency of the air column will be same .