Question
a cylinderical tube open at both ends has a fundamental frequency f in air the tube is dipped vertically in H2O so that half of it is in H2O the fundamental frequency of the air column is
1)f/2
2)3f/4
3)2f
4) f
aieee 2012
Joshi sir comment
for first case l = λ/2 so l = v/2f
for second case l/2 = λ/4 so l/2 = v/4f
so f in both case are same.
