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#### Tube A has both ends open while tube  B has one end closed, otherwise they are identical. The ratio of fundamental frequency of tube  A and B Option 1) Option 2) Option 3) Option 4)

As we learnt in

Closed organ pipe -

A closed organ pipe is a cylindrical tube having an air colume with one end closed.

- wherein

Condition of constructive interference

In tube A,    $\lambda _{A}= 2l$

In tube B     $\lambda _{B}= 4l$

$\therefore \: \: \: \: \upsilon _{A}= \frac{\nu }{\lambda _{A}}= \frac{\nu }{2l}$

$\therefore\: \: \: \: \upsilon _{B}= \frac{\nu }{\lambda _{B}}= \frac{\nu }{4l}$

Correct option is 3

Option 1)

This is an incorrect option.

Option 2)

This is an incorrect option.

Option 3)

This is the correct option.

Option 4)

This is an incorrect option.